Add 18/45 and 21/30
18/45 + 21/30 is 11/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
18/45 = 18 × 2/45 × 2 = 36/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
21/30 = 21 × 3/30 × 3 = 63/90 - Add the two like fractions:
36/90 + 63/90 = 36 + 63/90 = 99/90 - 99/90 simplified gives 11/10
- So, 18/45 + 21/30 = 11/10
In mixed form: 11/10
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