Subtract 45/50 from 40/80
40/80 - 45/50 is -2/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 50 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 80 × 5 = 400,
40/80 = 40 × 5/80 × 5 = 200/400 - Likewise, for the 2nd fraction, since 50 × 8 = 400,
45/50 = 45 × 8/50 × 8 = 360/400 - Subtract the two like fractions:
200/400 - 360/400 = 200 - 360/400 = -160/400 - After reducing the fraction, the answer is -2/5
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