Add 21/30 and 18/20
21/30 + 18/20 is 8/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 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 20 × 3 = 60,
18/20 = 18 × 3/20 × 3 = 54/60 - Add the two like fractions:
42/60 + 54/60 = 42 + 54/60 = 96/60 - 96/60 simplified gives 8/5
- So, 21/30 + 18/20 = 8/5
In mixed form: 13/5
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