Subtract 60/90 from 30/63
30/63 - 60/90 is -4/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
30/63 = 30 × 10/63 × 10 = 300/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
60/90 = 60 × 7/90 × 7 = 420/630 - Subtract the two like fractions:
300/630 - 420/630 = 300 - 420/630 = -120/630 - After reducing the fraction, the answer is -4/21
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