Subtract 80/90 from 15/25
15/25 - 80/90 is -13/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
15/25 = 15 × 18/25 × 18 = 270/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
80/90 = 80 × 5/90 × 5 = 400/450 - Subtract the two like fractions:
270/450 - 400/450 = 270 - 400/450 = -130/450 - After reducing the fraction, the answer is -13/45
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