Subtract 40/90 from 25/70
25/70 - 40/90 is -11/126.
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,
25/70 = 25 × 9/70 × 9 = 225/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
40/90 = 40 × 7/90 × 7 = 280/630 - Subtract the two like fractions:
225/630 - 280/630 = 225 - 280/630 = -55/630 - After reducing the fraction, the answer is -11/126
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