Step 1:
The first step to converting 217777678.51509 to a fraction is to re-write 217777678.51509 in the form p/q where p and q are both positive integers. To start with, 217777678.51509 can be written as simply 217777678.51509/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 217777678.51509, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 217777678.51509/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 217777678.51509/1 each by 100000:
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 217777678.51509 as a fraction:
217777678/1 / 1