Add 81/30 and 18/90
1st number: 2 21/30, 2nd number: 18/90
81/30 + 18/90 is 29/10.
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,
18/90 = 18 × 1/90 × 1 = 18/90 - Add the two like fractions:
243/90 + 18/90 = 243 + 18/90 = 261/90 - 261/90 simplified gives 29/10
- So, 81/30 + 18/90 = 29/10
In mixed form: 29/10
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