Subtract 15/63 from 90/70
1st number: 1 20/70, 2nd number: 15/63
90/70 - 15/63 is 22/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
90/70 = 90 × 9/70 × 9 = 810/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
15/63 = 15 × 10/63 × 10 = 150/630 - Subtract the two like fractions:
810/630 - 150/630 = 810 - 150/630 = 660/630 - After reducing the fraction, the answer is 22/21
- In mixed form: 11/21
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