Add 20/21 and 45/64
20/21 + 45/64 is 2225/1344.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 64 is 1344
Next, find the equivalent fraction of both fractional numbers with denominator 1344 - For the 1st fraction, since 21 × 64 = 1344,
20/21 = 20 × 64/21 × 64 = 1280/1344 - Likewise, for the 2nd fraction, since 64 × 21 = 1344,
45/64 = 45 × 21/64 × 21 = 945/1344 - Add the two like fractions:
1280/1344 + 945/1344 = 1280 + 945/1344 = 2225/1344 - So, 20/21 + 45/64 = 2225/1344
In mixed form: 1881/1344
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