Subtract 15/50 from 18/90
18/90 - 15/50 is -1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
18/90 = 18 × 5/90 × 5 = 90/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
15/50 = 15 × 9/50 × 9 = 135/450 - Subtract the two like fractions:
90/450 - 135/450 = 90 - 135/450 = -45/450 - After reducing the fraction, the answer is -1/10
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