Add 90/21 and 63/8
1st number: 4 6/21, 2nd number: 7 7/8
90/21 + 63/8 is 681/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
90/21 = 90 × 8/21 × 8 = 720/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
63/8 = 63 × 21/8 × 21 = 1323/168 - Add the two like fractions:
720/168 + 1323/168 = 720 + 1323/168 = 2043/168 - 2043/168 simplified gives 681/56
- So, 90/21 + 63/8 = 681/56
In mixed form: 129/56
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