Subtract 63/42 from 9/36, Solve 9/36

Subtract 63/42 from 9/36

1^st number: 9/36, 2^nd number: 1 21/42

9/36 - 63/42 is -5/4.

Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
9/36 = 9 × 7/36 × 7 = 63/252
Likewise, for the 2nd fraction, since 42 × 6 = 252,
63/42 = 63 × 6/42 × 6 = 378/252
Subtract the two like fractions:
63/252 - 378/252 = 63 - 378/252 = -315/252
After reducing the fraction, the answer is -5/4

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad