Add 15/30 and 21/45
15/30 + 21/45 is 29/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
15/30 = 15 × 3/30 × 3 = 45/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Add the two like fractions:
45/90 + 42/90 = 45 + 42/90 = 87/90 - 87/90 simplified gives 29/30
- So, 15/30 + 21/45 = 29/30
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