Add 81/90 and 81/60
1st number: 81/90, 2nd number: 1 21/60
81/90 + 81/60 is 9/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
81/90 = 81 × 2/90 × 2 = 162/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
81/60 = 81 × 3/60 × 3 = 243/180 - Add the two like fractions:
162/180 + 243/180 = 162 + 243/180 = 405/180 - 405/180 simplified gives 9/4
- So, 81/90 + 81/60 = 9/4
In mixed form: 21/4
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