Add 90/16 and 21/28
1st number: 5 10/16, 2nd number: 21/28
90/16 + 21/28 is 51/8.
Steps for adding 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,
21/28 = 21 × 4/28 × 4 = 84/112 - Add the two like fractions:
630/112 + 84/112 = 630 + 84/112 = 714/112 - 714/112 simplified gives 51/8
- So, 90/16 + 21/28 = 51/8
In mixed form: 63/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/16+42/28 90/32+21/28 90/16+21/56 90/16+63/28 90/48+21/28 90/16+21/84 90/80+21/28