Add 81/21 and 60/45
1st number: 3 18/21, 2nd number: 1 15/45
81/21 + 60/45 is 109/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
81/21 = 81 × 15/21 × 15 = 1215/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
60/45 = 60 × 7/45 × 7 = 420/315 - Add the two like fractions:
1215/315 + 420/315 = 1215 + 420/315 = 1635/315 - 1635/315 simplified gives 109/21
- So, 81/21 + 60/45 = 109/21
In mixed form: 54/21
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