Add 28/30 and 21/60
28/30 + 21/60 is 77/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
28/30 = 28 × 2/30 × 2 = 56/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Add the two like fractions:
56/60 + 21/60 = 56 + 21/60 = 77/60 - So, 28/30 + 21/60 = 77/60
In mixed form: 117/60
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