Question: What is -21.172072766309 as a fraction?

Step 1:

The first step to converting -21.172072766309 to a fraction is to re-write -21.172072766309 in the form p/q where p and q are both positive integers. To start with, -21.172072766309 can be written as simply -21.172072766309/1 to technically be written as a fraction.

Step 2:

Next, we will count the number of fractional digits after the decimal point in -21.172072766309, which in this case is 12. For however many digits after the decimal point there are, we will multiply the numerator and denominator of -21.172072766309/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of -21.172072766309/1 each by 1000000000000:

Step 3:

Now the last step is to simplify the fraction (if possible) by finding similar factors and cancelling them out, which leads to the following answer for -21.172072766309 as a fraction: