Subtract 42/18 from 8/30
1st number: 8/30, 2nd number: 2 6/18
8/30 - 42/18 is -31/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
8/30 = 8 × 3/30 × 3 = 24/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Subtract the two like fractions:
24/90 - 210/90 = 24 - 210/90 = -186/90 - After reducing the fraction, the answer is -31/15
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