Add 18/30 and 42/45
18/30 + 42/45 is 23/15.
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,
18/30 = 18 × 3/30 × 3 = 54/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
42/45 = 42 × 2/45 × 2 = 84/90 - Add the two like fractions:
54/90 + 84/90 = 54 + 84/90 = 138/90 - 138/90 simplified gives 23/15
- So, 18/30 + 42/45 = 23/15
In mixed form: 18/15
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