Add 20/42 and 42/63
20/42 + 42/63 is 8/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
20/42 = 20 × 3/42 × 3 = 60/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
42/63 = 42 × 2/63 × 2 = 84/126 - Add the two like fractions:
60/126 + 84/126 = 60 + 84/126 = 144/126 - 144/126 simplified gives 8/7
- So, 20/42 + 42/63 = 8/7
In mixed form: 11/7
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