Add 54/56 and 70/21
1st number: 54/56, 2nd number: 3 7/21
54/56 + 70/21 is 361/84.
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,
54/56 = 54 × 3/56 × 3 = 162/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
70/21 = 70 × 8/21 × 8 = 560/168 - Add the two like fractions:
162/168 + 560/168 = 162 + 560/168 = 722/168 - 722/168 simplified gives 361/84
- So, 54/56 + 70/21 = 361/84
In mixed form: 425/84
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