Add 54/60 and 21/42
54/60 + 21/42 is 7/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
54/60 = 54 × 7/60 × 7 = 378/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
21/42 = 21 × 10/42 × 10 = 210/420 - Add the two like fractions:
378/420 + 210/420 = 378 + 210/420 = 588/420 - 588/420 simplified gives 7/5
- So, 54/60 + 21/42 = 7/5
In mixed form: 12/5
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