Subtract 63/20 from 21/36
1st number: 21/36, 2nd number: 3 3/20
21/36 - 63/20 is -77/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
63/20 = 63 × 9/20 × 9 = 567/180 - Subtract the two like fractions:
105/180 - 567/180 = 105 - 567/180 = -462/180 - After reducing the fraction, the answer is -77/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36-63/20 21/72-63/20 21/36-63/40 63/36-63/20 21/36-63/60