Add 15/18 and 21/45
15/18 + 21/45 is 13/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
15/18 = 15 × 5/18 × 5 = 75/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Add the two like fractions:
75/90 + 42/90 = 75 + 42/90 = 117/90 - 117/90 simplified gives 13/10
- So, 15/18 + 21/45 = 13/10
In mixed form: 13/10
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