Add 21/24 and 3/15
21/24 + 3/15 is 43/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 24 × 5 = 120,
21/24 = 21 × 5/24 × 5 = 105/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
3/15 = 3 × 8/15 × 8 = 24/120 - Add the two like fractions:
105/120 + 24/120 = 105 + 24/120 = 129/120 - 129/120 simplified gives 43/40
- So, 21/24 + 3/15 = 43/40
In mixed form: 13/40
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