Add 42/45 and 15/90
42/45 + 15/90 is 11/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
42/45 = 42 × 2/45 × 2 = 84/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Add the two like fractions:
84/90 + 15/90 = 84 + 15/90 = 99/90 - 99/90 simplified gives 11/10
- So, 42/45 + 15/90 = 11/10
In mixed form: 11/10
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