Subtract 6/72 from 21/15
1st number: 1 6/15, 2nd number: 6/72
21/15 - 6/72 is 79/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
21/15 = 21 × 24/15 × 24 = 504/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
6/72 = 6 × 5/72 × 5 = 30/360 - Subtract the two like fractions:
504/360 - 30/360 = 504 - 30/360 = 474/360 - After reducing the fraction, the answer is 79/60
- In mixed form: 119/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15-6/72 21/15-12/72 21/30-6/72 63/15-6/72 21/15-18/72 21/45-6/72 21/15-30/72 21/75-6/72 21/15-42/72