Add 7/8 and 21/54
7/8 + 21/54 is 91/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 54 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 8 × 27 = 216,
7/8 = 7 × 27/8 × 27 = 189/216 - Likewise, for the 2nd fraction, since 54 × 4 = 216,
21/54 = 21 × 4/54 × 4 = 84/216 - Add the two like fractions:
189/216 + 84/216 = 189 + 84/216 = 273/216 - 273/216 simplified gives 91/72
- So, 7/8 + 21/54 = 91/72
In mixed form: 119/72
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