Subtract 80/63 from 70/90
1st number: 70/90, 2nd number: 1 17/63
70/90 - 80/63 is -31/63.
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,
70/90 = 70 × 7/90 × 7 = 490/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
80/63 = 80 × 10/63 × 10 = 800/630 - Subtract the two like fractions:
490/630 - 800/630 = 490 - 800/630 = -310/630 - After reducing the fraction, the answer is -31/63
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