Add 7/42 and 20/80
7/42 + 20/80 is 5/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
7/42 = 7 × 40/42 × 40 = 280/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
20/80 = 20 × 21/80 × 21 = 420/1680 - Add the two like fractions:
280/1680 + 420/1680 = 280 + 420/1680 = 700/1680 - 700/1680 simplified gives 5/12
- So, 7/42 + 20/80 = 5/12
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