Add 20/42 and 18/70
20/42 + 18/70 is 11/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
18/70 = 18 × 3/70 × 3 = 54/210 - Add the two like fractions:
100/210 + 54/210 = 100 + 54/210 = 154/210 - 154/210 simplified gives 11/15
- So, 20/42 + 18/70 = 11/15
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