Add 21/16 and 40/7
1st number: 1 5/16, 2nd number: 5 5/7
21/16 + 40/7 is 787/112.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 7 is 112
Next, find the equivalent fraction of both fractional numbers with denominator 112 - For the 1st fraction, since 16 × 7 = 112,
21/16 = 21 × 7/16 × 7 = 147/112 - Likewise, for the 2nd fraction, since 7 × 16 = 112,
40/7 = 40 × 16/7 × 16 = 640/112 - Add the two like fractions:
147/112 + 640/112 = 147 + 640/112 = 787/112 - So, 21/16 + 40/7 = 787/112
In mixed form: 73/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/16+40/7 21/16+80/7 21/32+40/7 21/16+40/14 63/16+40/7 21/48+40/7 21/16+40/21 21/80+40/7 21/16+40/35 21/16+40/49