Subtract 75/70 from 42/63
1st number: 42/63, 2nd number: 1 5/70
42/63 - 75/70 is -17/42.
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,
42/63 = 42 × 10/63 × 10 = 420/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
75/70 = 75 × 9/70 × 9 = 675/630 - Subtract the two like fractions:
420/630 - 675/630 = 420 - 675/630 = -255/630 - After reducing the fraction, the answer is -17/42
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