Add 81/90 and 15/30
81/90 + 15/30 is 7/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
81/90 = 81 × 1/90 × 1 = 81/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
15/30 = 15 × 3/30 × 3 = 45/90 - Add the two like fractions:
81/90 + 45/90 = 81 + 45/90 = 126/90 - 126/90 simplified gives 7/5
- So, 81/90 + 15/30 = 7/5
In mixed form: 12/5
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