Add 20/21 and 90/64
1st number: 20/21, 2nd number: 1 26/64
20/21 + 90/64 is 1585/672.
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,
90/64 = 90 × 21/64 × 21 = 1890/1344 - Add the two like fractions:
1280/1344 + 1890/1344 = 1280 + 1890/1344 = 3170/1344 - 3170/1344 simplified gives 1585/672
- So, 20/21 + 90/64 = 1585/672
In mixed form: 2241/672
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