Subtract 84/42 from 10/80
1st number: 10/80, 2nd number: 2 0/42
10/80 - 84/42 is -15/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
10/80 = 10 × 21/80 × 21 = 210/1680 - Likewise, for the 2nd fraction, since 42 × 40 = 1680,
84/42 = 84 × 40/42 × 40 = 3360/1680 - Subtract the two like fractions:
210/1680 - 3360/1680 = 210 - 3360/1680 = -3150/1680 - After reducing the fraction, the answer is -15/8
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