Subtract 49/42 from 28/90
1st number: 28/90, 2nd number: 1 7/42
28/90 - 49/42 is -77/90.
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,
28/90 = 28 × 7/90 × 7 = 196/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
49/42 = 49 × 15/42 × 15 = 735/630 - Subtract the two like fractions:
196/630 - 735/630 = 196 - 735/630 = -539/630 - After reducing the fraction, the answer is -77/90
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