Add 27/28 and 42/21
1st number: 27/28, 2nd number: 2 0/21
27/28 + 42/21 is 83/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
27/28 = 27 × 3/28 × 3 = 81/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
42/21 = 42 × 4/21 × 4 = 168/84 - Add the two like fractions:
81/84 + 168/84 = 81 + 168/84 = 249/84 - 249/84 simplified gives 83/28
- So, 27/28 + 42/21 = 83/28
In mixed form: 227/28
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