Add 12/18 and 21/90
12/18 + 21/90 is 9/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
12/18 = 12 × 5/18 × 5 = 60/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Add the two like fractions:
60/90 + 21/90 = 60 + 21/90 = 81/90 - 81/90 simplified gives 9/10
- So, 12/18 + 21/90 = 9/10
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