Subtract 90/42 from 84/45
1st number: 1 39/45, 2nd number: 2 6/42
84/45 - 90/42 is -29/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
84/45 = 84 × 14/45 × 14 = 1176/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
90/42 = 90 × 15/42 × 15 = 1350/630 - Subtract the two like fractions:
1176/630 - 1350/630 = 1176 - 1350/630 = -174/630 - After reducing the fraction, the answer is -29/105
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Related: 84/90-90/42 84/45-90/84