If you want to learn more, then please keep reading, and you won't be disappointed.

We already have our first value **42** and the second value **30**. Let's assume the unknown value is **Y** which answer we will find out.

As we have all the required values we need, Now we can put them in a simple mathematical formula as below:

STEP 1Y = 42100

STEP 2Y = 42100 × 30

STEP 3Y = 42 ÷ 100 × 30

STEP 4Y = 12.6

Finally, we have found the value of Y which is 12.6 and that is our answer.

If you want to use a calculator to know **what is 42 percent of 30**, simply enter **42 ÷ 100 × 30** and you will get your answer which is **12.6**

Here is a calculator to solve percentage calculations such as what is 42% of 30. You can solve this type of calculation with your values by entering them into the calculator's fields, and click *'Calculate'* to get the result and explanation.

**Question:** At a high school 42 percent of seniors went on a mission trip. There were 30 seniors. How many seniors went on the trip?

**Answer:** 12.6 seniors went on the trip.

**Question:** 42 percent of the children in kindergarten like Thomas the Train. If there are 30 kids in kindergarten, how many of them like Thomas?

**Answer:** 12.6 kids like Thomas the Train.

**Step 1:** Let's solve the equation for Y by first rewriting it as: **100% / 30 = 42% / Y**

**Step 2:** Drop the percentage marks to simplify your calculations: **100 / 30 = 42 / Y**

**Step 3:** Multiply both sides by Y to transfer it on the left side of the equation: **Y ( 100 / 30 ) = 42**

**Step 4:** To isolate Y, multiply both sides by 30 / 100, we will have: **Y = 42 ( 30 / 100 )**

**Step 5:** Computing the right side, we get: **Y = 12.6**

This leaves us with our final answer: **42% of 30 is 12.6**

42 percent of 30 is 12.6 |

42.01 percent of 30 is 12.603 |

42.02 percent of 30 is 12.606 |

42.03 percent of 30 is 12.609 |

42.04 percent of 30 is 12.612 |

42.05 percent of 30 is 12.615 |

42.06 percent of 30 is 12.618 |

42.07 percent of 30 is 12.621 |

42.08 percent of 30 is 12.624 |

42.09 percent of 30 is 12.627 |

42.1 percent of 30 is 12.63 |

42.11 percent of 30 is 12.633 |

42.12 percent of 30 is 12.636 |

42.13 percent of 30 is 12.639 |

42.14 percent of 30 is 12.642 |

42.15 percent of 30 is 12.645 |

42.16 percent of 30 is 12.648 |

42.17 percent of 30 is 12.651 |

42.18 percent of 30 is 12.654 |

42.19 percent of 30 is 12.657 |

42.2 percent of 30 is 12.66 |

42.21 percent of 30 is 12.663 |

42.22 percent of 30 is 12.666 |

42.23 percent of 30 is 12.669 |

42.24 percent of 30 is 12.672 |

42.25 percent of 30 is 12.675 |

42.26 percent of 30 is 12.678 |

42.27 percent of 30 is 12.681 |

42.28 percent of 30 is 12.684 |

42.29 percent of 30 is 12.687 |

42.3 percent of 30 is 12.69 |

42.31 percent of 30 is 12.693 |

42.32 percent of 30 is 12.696 |

42.33 percent of 30 is 12.699 |

42.34 percent of 30 is 12.702 |

42.35 percent of 30 is 12.705 |

42.36 percent of 30 is 12.708 |

42.37 percent of 30 is 12.711 |

42.38 percent of 30 is 12.714 |

42.39 percent of 30 is 12.717 |

42.4 percent of 30 is 12.72 |

42.41 percent of 30 is 12.723 |

42.42 percent of 30 is 12.726 |

42.43 percent of 30 is 12.729 |

42.44 percent of 30 is 12.732 |

42.45 percent of 30 is 12.735 |

42.46 percent of 30 is 12.738 |

42.47 percent of 30 is 12.741 |

42.48 percent of 30 is 12.744 |

42.49 percent of 30 is 12.747 |

42.5 percent of 30 is 12.75 |

42.51 percent of 30 is 12.753 |

42.52 percent of 30 is 12.756 |

42.53 percent of 30 is 12.759 |

42.54 percent of 30 is 12.762 |

42.55 percent of 30 is 12.765 |

42.56 percent of 30 is 12.768 |

42.57 percent of 30 is 12.771 |

42.58 percent of 30 is 12.774 |

42.59 percent of 30 is 12.777 |

42.6 percent of 30 is 12.78 |

42.61 percent of 30 is 12.783 |

42.62 percent of 30 is 12.786 |

42.63 percent of 30 is 12.789 |

42.64 percent of 30 is 12.792 |

42.65 percent of 30 is 12.795 |

42.66 percent of 30 is 12.798 |

42.67 percent of 30 is 12.801 |

42.68 percent of 30 is 12.804 |

42.69 percent of 30 is 12.807 |

42.7 percent of 30 is 12.81 |

42.71 percent of 30 is 12.813 |

42.72 percent of 30 is 12.816 |

42.73 percent of 30 is 12.819 |

42.74 percent of 30 is 12.822 |

42.75 percent of 30 is 12.825 |

42.76 percent of 30 is 12.828 |

42.77 percent of 30 is 12.831 |

42.78 percent of 30 is 12.834 |

42.79 percent of 30 is 12.837 |

42.8 percent of 30 is 12.84 |

42.81 percent of 30 is 12.843 |

42.82 percent of 30 is 12.846 |

42.83 percent of 30 is 12.849 |

42.84 percent of 30 is 12.852 |

42.85 percent of 30 is 12.855 |

42.86 percent of 30 is 12.858 |

42.87 percent of 30 is 12.861 |

42.88 percent of 30 is 12.864 |

42.89 percent of 30 is 12.867 |

42.9 percent of 30 is 12.87 |

42.91 percent of 30 is 12.873 |

42.92 percent of 30 is 12.876 |

42.93 percent of 30 is 12.879 |

42.94 percent of 30 is 12.882 |

42.95 percent of 30 is 12.885 |

42.96 percent of 30 is 12.888 |

42.97 percent of 30 is 12.891 |

42.98 percent of 30 is 12.894 |

42.99 percent of 30 is 12.897 |