Add 21/30 and 20/60
21/30 + 20/60 is 31/30.
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,
21/30 = 21 × 2/30 × 2 = 42/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
20/60 = 20 × 1/60 × 1 = 20/60 - Add the two like fractions:
42/60 + 20/60 = 42 + 20/60 = 62/60 - 62/60 simplified gives 31/30
- So, 21/30 + 20/60 = 31/30
In mixed form: 11/30
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