Subtract 25/45 from 15/63
15/63 - 25/45 is -20/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
15/63 = 15 × 5/63 × 5 = 75/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
25/45 = 25 × 7/45 × 7 = 175/315 - Subtract the two like fractions:
75/315 - 175/315 = 75 - 175/315 = -100/315 - After reducing the fraction, the answer is -20/63
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