Add 81/72 and 18/90
1st number: 1 9/72, 2nd number: 18/90
81/72 + 18/90 is 53/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
81/72 = 81 × 5/72 × 5 = 405/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
18/90 = 18 × 4/90 × 4 = 72/360 - Add the two like fractions:
405/360 + 72/360 = 405 + 72/360 = 477/360 - 477/360 simplified gives 53/40
- So, 81/72 + 18/90 = 53/40
In mixed form: 113/40
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