Add 20/21 and 28/32
20/21 + 28/32 is 307/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 32 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 21 × 32 = 672,
20/21 = 20 × 32/21 × 32 = 640/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
28/32 = 28 × 21/32 × 21 = 588/672 - Add the two like fractions:
640/672 + 588/672 = 640 + 588/672 = 1228/672 - 1228/672 simplified gives 307/168
- So, 20/21 + 28/32 = 307/168
In mixed form: 1139/168
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