Subtract 21/72 from 8/35
8/35 - 21/72 is -53/840.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 35 × 72 = 2520,
8/35 = 8 × 72/35 × 72 = 576/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
21/72 = 21 × 35/72 × 35 = 735/2520 - Subtract the two like fractions:
576/2520 - 735/2520 = 576 - 735/2520 = -159/2520 - After reducing the fraction, the answer is -53/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/35-21/72 8/35-42/72 8/70-21/72 24/35-21/72 8/35-63/72 40/35-21/72 56/35-21/72