Add 72/90 and 81/72
1st number: 72/90, 2nd number: 1 9/72
72/90 + 81/72 is 77/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
72/90 = 72 × 4/90 × 4 = 288/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
81/72 = 81 × 5/72 × 5 = 405/360 - Add the two like fractions:
288/360 + 405/360 = 288 + 405/360 = 693/360 - 693/360 simplified gives 77/40
- So, 72/90 + 81/72 = 77/40
In mixed form: 137/40
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