Subtract 27/90 from 3/70
3/70 - 27/90 is -9/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
3/70 = 3 × 9/70 × 9 = 27/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
27/90 = 27 × 7/90 × 7 = 189/630 - Subtract the two like fractions:
27/630 - 189/630 = 27 - 189/630 = -162/630 - After reducing the fraction, the answer is -9/35
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