Subtract 20/28 from 90/16
1st number: 5 10/16, 2nd number: 20/28
90/16 - 20/28 is 275/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 28 is 112
Next, find the equivalent fraction of both fractional numbers with denominator 112 - For the 1st fraction, since 16 × 7 = 112,
90/16 = 90 × 7/16 × 7 = 630/112 - Likewise, for the 2nd fraction, since 28 × 4 = 112,
20/28 = 20 × 4/28 × 4 = 80/112 - Subtract the two like fractions:
630/112 - 80/112 = 630 - 80/112 = 550/112 - After reducing the fraction, the answer is 275/56
- In mixed form: 451/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/16-40/28 90/32-20/28 90/16-20/56 90/16-60/28 90/48-20/28 90/16-20/84 90/80-20/28