Step 1:
The first step to converting 1521375.9860531 to a fraction is to re-write 1521375.9860531 in the form p/q where p and q are both positive integers. To start with, 1521375.9860531 can be written as simply 1521375.9860531/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 1521375.9860531, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 1521375.9860531/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 1521375.9860531/1 each by 10000000:
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 1521375.9860531 as a fraction:
1521375/1 / 1