Add 9/21 and 7/8
9/21 + 7/8 is 73/56.
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,
9/21 = 9 × 8/21 × 8 = 72/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
7/8 = 7 × 21/8 × 21 = 147/168 - Add the two like fractions:
72/168 + 147/168 = 72 + 147/168 = 219/168 - 219/168 simplified gives 73/56
- So, 9/21 + 7/8 = 73/56
In mixed form: 117/56
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