Subtract 54/63 from 63/90
63/90 - 54/63 is -11/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
63/90 = 63 × 7/90 × 7 = 441/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
54/63 = 54 × 10/63 × 10 = 540/630 - Subtract the two like fractions:
441/630 - 540/630 = 441 - 540/630 = -99/630 - After reducing the fraction, the answer is -11/70
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