Add 21/42 and 81/16
1st number: 21/42, 2nd number: 5 1/16
21/42 + 81/16 is 89/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 42 × 8 = 336,
21/42 = 21 × 8/42 × 8 = 168/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
81/16 = 81 × 21/16 × 21 = 1701/336 - Add the two like fractions:
168/336 + 1701/336 = 168 + 1701/336 = 1869/336 - 1869/336 simplified gives 89/16
- So, 21/42 + 81/16 = 89/16
In mixed form: 59/16
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