Add 20/21 and 18/32
20/21 + 18/32 is 509/336.
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,
18/32 = 18 × 21/32 × 21 = 378/672 - Add the two like fractions:
640/672 + 378/672 = 640 + 378/672 = 1018/672 - 1018/672 simplified gives 509/336
- So, 20/21 + 18/32 = 509/336
In mixed form: 1173/336
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