Add 1/21 and 90/56
1st number: 1/21, 2nd number: 1 34/56
1/21 + 90/56 is 139/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
1/21 = 1 × 8/21 × 8 = 8/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
90/56 = 90 × 3/56 × 3 = 270/168 - Add the two like fractions:
8/168 + 270/168 = 8 + 270/168 = 278/168 - 278/168 simplified gives 139/84
- So, 1/21 + 90/56 = 139/84
In mixed form: 155/84
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