Add 42/16 and 72/21
1st number: 2 10/16, 2nd number: 3 9/21
42/16 + 72/21 is 339/56.
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,
42/16 = 42 × 21/16 × 21 = 882/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
72/21 = 72 × 16/21 × 16 = 1152/336 - Add the two like fractions:
882/336 + 1152/336 = 882 + 1152/336 = 2034/336 - 2034/336 simplified gives 339/56
- So, 42/16 + 72/21 = 339/56
In mixed form: 63/56
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