Subtract 21/72 from 60/42
1st number: 1 18/42, 2nd number: 21/72
60/42 - 21/72 is 191/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
60/42 = 60 × 12/42 × 12 = 720/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
21/72 = 21 × 7/72 × 7 = 147/504 - Subtract the two like fractions:
720/504 - 147/504 = 720 - 147/504 = 573/504 - After reducing the fraction, the answer is 191/168
- In mixed form: 123/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42-42/72 60/84-21/72 60/42-63/72