Subtract 30/90 from 72/63
1st number: 1 9/63, 2nd number: 30/90
72/63 - 30/90 is 17/21.
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,
72/63 = 72 × 10/63 × 10 = 720/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
30/90 = 30 × 7/90 × 7 = 210/630 - Subtract the two like fractions:
720/630 - 210/630 = 720 - 210/630 = 510/630 - After reducing the fraction, the answer is 17/21
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