Subtract 2/72 from 12/21
12/21 - 2/72 is 137/252.
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,
12/21 = 12 × 24/21 × 24 = 288/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
2/72 = 2 × 7/72 × 7 = 14/504 - Subtract the two like fractions:
288/504 - 14/504 = 288 - 14/504 = 274/504 - After reducing the fraction, the answer is 137/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21-2/72 12/21-4/72 12/42-2/72 36/21-2/72 12/21-6/72 12/63-2/72 60/21-2/72 12/21-10/72 84/21-2/72 12/21-14/72