Subtract 56/72 from 90/20
1st number: 4 10/20, 2nd number: 56/72
90/20 - 56/72 is 67/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
90/20 = 90 × 18/20 × 18 = 1620/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
56/72 = 56 × 5/72 × 5 = 280/360 - Subtract the two like fractions:
1620/360 - 280/360 = 1620 - 280/360 = 1340/360 - After reducing the fraction, the answer is 67/18
- In mixed form: 313/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40-56/72 90/60-56/72