Subtract 7/72 from 63/42
1st number: 1 21/42, 2nd number: 7/72
63/42 - 7/72 is 101/72.
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,
63/42 = 63 × 12/42 × 12 = 756/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
7/72 = 7 × 7/72 × 7 = 49/504 - Subtract the two like fractions:
756/504 - 49/504 = 756 - 49/504 = 707/504 - After reducing the fraction, the answer is 101/72
- In mixed form: 129/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42-14/72 63/84-7/72 63/42-21/72 63/42-35/72 63/42-49/72