Add 81/30 and 36/90
1st number: 2 21/30, 2nd number: 36/90
81/30 + 36/90 is 31/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
81/30 = 81 × 3/30 × 3 = 243/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
36/90 = 36 × 1/90 × 1 = 36/90 - Add the two like fractions:
243/90 + 36/90 = 243 + 36/90 = 279/90 - 279/90 simplified gives 31/10
- So, 81/30 + 36/90 = 31/10
In mixed form: 31/10
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