Add 21/40 and 4/15
21/40 + 4/15 is 19/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
4/15 = 4 × 8/15 × 8 = 32/120 - Add the two like fractions:
63/120 + 32/120 = 63 + 32/120 = 95/120 - 95/120 simplified gives 19/24
- So, 21/40 + 4/15 = 19/24
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