Add 21/64 and 7/20
21/64 + 7/20 is 217/320.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 20 is 320
Next, find the equivalent fraction of both fractional numbers with denominator 320 - For the 1st fraction, since 64 × 5 = 320,
21/64 = 21 × 5/64 × 5 = 105/320 - Likewise, for the 2nd fraction, since 20 × 16 = 320,
7/20 = 7 × 16/20 × 16 = 112/320 - Add the two like fractions:
105/320 + 112/320 = 105 + 112/320 = 217/320 - So, 21/64 + 7/20 = 217/320
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