Subtract 42/63 from 9/45
9/45 - 42/63 is -7/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
9/45 = 9 × 7/45 × 7 = 63/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
42/63 = 42 × 5/63 × 5 = 210/315 - Subtract the two like fractions:
63/315 - 210/315 = 63 - 210/315 = -147/315 - After reducing the fraction, the answer is -7/15
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