Add 18/42 and 10/15
18/42 + 10/15 is 23/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
18/42 = 18 × 5/42 × 5 = 90/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
10/15 = 10 × 14/15 × 14 = 140/210 - Add the two like fractions:
90/210 + 140/210 = 90 + 140/210 = 230/210 - 230/210 simplified gives 23/21
- So, 18/42 + 10/15 = 23/21
In mixed form: 12/21
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