Add 20/36 and 21/42
20/36 + 21/42 is 19/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 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 42 × 6 = 252,
21/42 = 21 × 6/42 × 6 = 126/252 - Add the two like fractions:
140/252 + 126/252 = 140 + 126/252 = 266/252 - 266/252 simplified gives 19/18
- So, 20/36 + 21/42 = 19/18
In mixed form: 11/18
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