Add 20/42 and 3/9
20/42 + 3/9 is 17/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 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 9 × 14 = 126,
3/9 = 3 × 14/9 × 14 = 42/126 - Add the two like fractions:
60/126 + 42/126 = 60 + 42/126 = 102/126 - 102/126 simplified gives 17/21
- So, 20/42 + 3/9 = 17/21
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