Subtract 10/35 from 21/72
21/72 - 10/35 is 1/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 35 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
21/72 = 21 × 35/72 × 35 = 735/2520 - Likewise, for the 2nd fraction, since 35 × 72 = 2520,
10/35 = 10 × 72/35 × 72 = 720/2520 - Subtract the two like fractions:
735/2520 - 720/2520 = 735 - 720/2520 = 15/2520 - After reducing the fraction, the answer is 1/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/72-10/35 21/72-20/35 21/72-10/70 63/72-10/35 21/72-30/35 21/72-50/35 21/72-70/35