Subtract 12/56 from 20/72
20/72 - 12/56 is 4/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
20/72 = 20 × 7/72 × 7 = 140/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
12/56 = 12 × 9/56 × 9 = 108/504 - Subtract the two like fractions:
140/504 - 108/504 = 140 - 108/504 = 32/504 - After reducing the fraction, the answer is 4/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72-12/56 20/72-24/56 60/72-12/56 20/72-36/56 20/72-60/56 20/72-84/56