How do you write 0.42 as a fraction or mixed number in simplest form?

Answer 1

Here's one way: move the decimal point to the right, so that it's an integer, then that's the numerator, and the denominator is a power of ten equal to the number of places you moved. So move 2 places to make it 42, and the denominator is 10² = 100. So you have 42/100, then simplify = 21/50. You can check your work by doing the division.

Answer 2

21/50