Add 20/36 and 9/21
20/36 + 9/21 is 62/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
20/36 = 20 × 7/36 × 7 = 140/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
9/21 = 9 × 12/21 × 12 = 108/252 - Add the two like fractions:
140/252 + 108/252 = 140 + 108/252 = 248/252 - 248/252 simplified gives 62/63
- So, 20/36 + 9/21 = 62/63
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