Subtract 90/70 from 70/63
1st number: 1 7/63, 2nd number: 1 20/70
70/63 - 90/70 is -11/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
70/63 = 70 × 10/63 × 10 = 700/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
90/70 = 90 × 9/70 × 9 = 810/630 - Subtract the two like fractions:
700/630 - 810/630 = 700 - 810/630 = -110/630 - After reducing the fraction, the answer is -11/63
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