Add 21/16 and 40/21
1st number: 1 5/16, 2nd number: 1 19/21
21/16 + 40/21 is 1081/336.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 21 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
21/16 = 21 × 21/16 × 21 = 441/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
40/21 = 40 × 16/21 × 16 = 640/336 - Add the two like fractions:
441/336 + 640/336 = 441 + 640/336 = 1081/336 - So, 21/16 + 40/21 = 1081/336
In mixed form: 373/336
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