Add 21/30 and 4/5
21/30 + 4/5 is 3/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 5 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Likewise, for the 2nd fraction, since 5 × 6 = 30,
4/5 = 4 × 6/5 × 6 = 24/30 - Add the two like fractions:
21/30 + 24/30 = 21 + 24/30 = 45/30 - 45/30 simplified gives 3/2
- So, 21/30 + 4/5 = 3/2
In mixed form: 11/2
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