Subtract 54/63 from 9/30
9/30 - 54/63 is -39/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
9/30 = 9 × 21/30 × 21 = 189/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
54/63 = 54 × 10/63 × 10 = 540/630 - Subtract the two like fractions:
189/630 - 540/630 = 189 - 540/630 = -351/630 - After reducing the fraction, the answer is -39/70
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