Add 21/7 and 81/16
1st number: 3 0/7, 2nd number: 5 1/16
21/7 + 81/16 is 129/16.
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,
81/16 = 81 × 7/16 × 7 = 567/112 - Add the two like fractions:
336/112 + 567/112 = 336 + 567/112 = 903/112 - 903/112 simplified gives 129/16
- So, 21/7 + 81/16 = 129/16
In mixed form: 81/16
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