Add 21/7 and 21/16
1st number: 3 0/7, 2nd number: 1 5/16
21/7 + 21/16 is 69/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 16 is 112
Next, find the equivalent fraction of both fractional numbers with denominator 112 - For the 1st fraction, since 7 × 16 = 112,
21/7 = 21 × 16/7 × 16 = 336/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
21/16 = 21 × 7/16 × 7 = 147/112 - Add the two like fractions:
336/112 + 147/112 = 336 + 147/112 = 483/112 - 483/112 simplified gives 69/16
- So, 21/7 + 21/16 = 69/16
In mixed form: 45/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+21/16 21/7+42/16 21/14+21/16 21/7+21/32 63/7+21/16 21/7+63/16 21/7+21/48 21/35+21/16 21/7+21/80 21/49+21/16