Subtract 36/63 from 21/28
21/28 - 36/63 is 5/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
21/28 = 21 × 9/28 × 9 = 189/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
36/63 = 36 × 4/63 × 4 = 144/252 - Subtract the two like fractions:
189/252 - 144/252 = 189 - 144/252 = 45/252 - After reducing the fraction, the answer is 5/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28-36/63 21/28-72/63 21/56-36/63 63/28-36/63 21/84-36/63