Subtract 40/45 from 49/70
49/70 - 40/45 is -17/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
49/70 = 49 × 9/70 × 9 = 441/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
40/45 = 40 × 14/45 × 14 = 560/630 - Subtract the two like fractions:
441/630 - 560/630 = 441 - 560/630 = -119/630 - After reducing the fraction, the answer is -17/90
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