Add 81/90 and 72/18
1st number: 81/90, 2nd number: 4 0/18
81/90 + 72/18 is 49/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 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 18 × 5 = 90,
72/18 = 72 × 5/18 × 5 = 360/90 - Add the two like fractions:
81/90 + 360/90 = 81 + 360/90 = 441/90 - 441/90 simplified gives 49/10
- So, 81/90 + 72/18 = 49/10
In mixed form: 49/10
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