Add 84/56 and 84/21
1st number: 1 28/56, 2nd number: 4 0/21
84/56 + 84/21 is 11/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
84/56 = 84 × 3/56 × 3 = 252/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
84/21 = 84 × 8/21 × 8 = 672/168 - Add the two like fractions:
252/168 + 672/168 = 252 + 672/168 = 924/168 - 924/168 simplified gives 11/2
- So, 84/56 + 84/21 = 11/2
In mixed form: 51/2
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