Subtract 96/72 from 21/84
1st number: 21/84, 2nd number: 1 24/72
21/84 - 96/72 is -13/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 84 × 6 = 504,
21/84 = 21 × 6/84 × 6 = 126/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
96/72 = 96 × 7/72 × 7 = 672/504 - Subtract the two like fractions:
126/504 - 672/504 = 126 - 672/504 = -546/504 - After reducing the fraction, the answer is -13/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84-96/72 63/84-96/72