Subtract 42/45 from 8/30
8/30 - 42/45 is -2/3.
Steps for subtracting 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,
8/30 = 8 × 3/30 × 3 = 24/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
42/45 = 42 × 2/45 × 2 = 84/90 - Subtract the two like fractions:
24/90 - 84/90 = 24 - 84/90 = -60/90 - After reducing the fraction, the answer is -2/3
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