Add 18/15 and 45/42
1st number: 1 3/15, 2nd number: 1 3/42
18/15 + 45/42 is 159/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
18/15 = 18 × 14/15 × 14 = 252/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
45/42 = 45 × 5/42 × 5 = 225/210 - Add the two like fractions:
252/210 + 225/210 = 252 + 225/210 = 477/210 - 477/210 simplified gives 159/70
- So, 18/15 + 45/42 = 159/70
In mixed form: 219/70
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