Subtract 45/42 from 84/90
1st number: 84/90, 2nd number: 1 3/42
84/90 - 45/42 is -29/210.
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,
84/90 = 84 × 7/90 × 7 = 588/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
45/42 = 45 × 15/42 × 15 = 675/630 - Subtract the two like fractions:
588/630 - 675/630 = 588 - 675/630 = -87/630 - After reducing the fraction, the answer is -29/210
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Related: 84/90-90/42 84/90-45/84