Add 15/20 and 42/90
15/20 + 42/90 is 73/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
15/20 = 15 × 9/20 × 9 = 135/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
42/90 = 42 × 2/90 × 2 = 84/180 - Add the two like fractions:
135/180 + 84/180 = 135 + 84/180 = 219/180 - 219/180 simplified gives 73/60
- So, 15/20 + 42/90 = 73/60
In mixed form: 113/60
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