Subtract 18/7 from 84/90
1st number: 84/90, 2nd number: 2 4/7
84/90 - 18/7 is -172/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 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 7 × 90 = 630,
18/7 = 18 × 90/7 × 90 = 1620/630 - Subtract the two like fractions:
588/630 - 1620/630 = 588 - 1620/630 = -1032/630 - After reducing the fraction, the answer is -172/105
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