Add 42/18 and 81/30
1st number: 2 6/18, 2nd number: 2 21/30
42/18 + 81/30 is 151/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
81/30 = 81 × 3/30 × 3 = 243/90 - Add the two like fractions:
210/90 + 243/90 = 210 + 243/90 = 453/90 - 453/90 simplified gives 151/30
- So, 42/18 + 81/30 = 151/30
In mixed form: 51/30
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