Subtract 15/30 from 8/40
8/40 - 15/30 is -3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
8/40 = 8 × 3/40 × 3 = 24/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
15/30 = 15 × 4/30 × 4 = 60/120 - Subtract the two like fractions:
24/120 - 60/120 = 24 - 60/120 = -36/120 - After reducing the fraction, the answer is -3/10
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