Subtract 28/42 from 49/90
49/90 - 28/42 is -11/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
49/90 = 49 × 7/90 × 7 = 343/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
28/42 = 28 × 15/42 × 15 = 420/630 - Subtract the two like fractions:
343/630 - 420/630 = 343 - 420/630 = -77/630 - After reducing the fraction, the answer is -11/90
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