Add 7/8 and 21/84
7/8 + 21/84 is 9/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 84 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
7/8 = 7 × 21/8 × 21 = 147/168 - Likewise, for the 2nd fraction, since 84 × 2 = 168,
21/84 = 21 × 2/84 × 2 = 42/168 - Add the two like fractions:
147/168 + 42/168 = 147 + 42/168 = 189/168 - 189/168 simplified gives 9/8
- So, 7/8 + 21/84 = 9/8
In mixed form: 11/8
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