Add 21/84 and 90/56
1st number: 21/84, 2nd number: 1 34/56
21/84 + 90/56 is 13/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
21/84 = 21 × 2/84 × 2 = 42/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
90/56 = 90 × 3/56 × 3 = 270/168 - Add the two like fractions:
42/168 + 270/168 = 42 + 270/168 = 312/168 - 312/168 simplified gives 13/7
- So, 21/84 + 90/56 = 13/7
In mixed form: 16/7
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