Add 81/60 and 21/40
1st number: 1 21/60, 2nd number: 21/40
81/60 + 21/40 is 15/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 60 × 2 = 120,
81/60 = 81 × 2/60 × 2 = 162/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Add the two like fractions:
162/120 + 63/120 = 162 + 63/120 = 225/120 - 225/120 simplified gives 15/8
- So, 81/60 + 21/40 = 15/8
In mixed form: 17/8
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