Add 18/42 and 90/15
1st number: 18/42, 2nd number: 6 0/15
18/42 + 90/15 is 45/7.
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,
90/15 = 90 × 14/15 × 14 = 1260/210 - Add the two like fractions:
90/210 + 1260/210 = 90 + 1260/210 = 1350/210 - 1350/210 simplified gives 45/7
- So, 18/42 + 90/15 = 45/7
In mixed form: 63/7
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