Subtract 3/72 from 10/21
10/21 - 3/72 is 73/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
10/21 = 10 × 24/21 × 24 = 240/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
3/72 = 3 × 7/72 × 7 = 21/504 - Subtract the two like fractions:
240/504 - 21/504 = 240 - 21/504 = 219/504 - After reducing the fraction, the answer is 73/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21-3/72 10/21-6/72 10/42-3/72 30/21-3/72 10/21-9/72 10/63-3/72 50/21-3/72 10/21-15/72 70/21-3/72 10/21-21/72