Add 21/30 and 56/64
21/30 + 56/64 is 63/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 64 is 960
Next, find the equivalent fraction of both fractional numbers with denominator 960 - For the 1st fraction, since 30 × 32 = 960,
21/30 = 21 × 32/30 × 32 = 672/960 - Likewise, for the 2nd fraction, since 64 × 15 = 960,
56/64 = 56 × 15/64 × 15 = 840/960 - Add the two like fractions:
672/960 + 840/960 = 672 + 840/960 = 1512/960 - 1512/960 simplified gives 63/40
- So, 21/30 + 56/64 = 63/40
In mixed form: 123/40
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