Subtract 21/6 from 80/72
1st number: 1 8/72, 2nd number: 3 3/6
80/72 - 21/6 is -43/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 6 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
80/72 = 80 × 1/72 × 1 = 80/72 - Likewise, for the 2nd fraction, since 6 × 12 = 72,
21/6 = 21 × 12/6 × 12 = 252/72 - Subtract the two like fractions:
80/72 - 252/72 = 80 - 252/72 = -172/72 - After reducing the fraction, the answer is -43/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/72-42/6 80/72-21/12 80/72-63/6 80/72-21/18 80/72-21/30 80/72-21/42