Subtract 18/42 from 84/40
1st number: 2 4/40, 2nd number: 18/42
84/40 - 18/42 is 117/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
84/40 = 84 × 21/40 × 21 = 1764/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
18/42 = 18 × 20/42 × 20 = 360/840 - Subtract the two like fractions:
1764/840 - 360/840 = 1764 - 360/840 = 1404/840 - After reducing the fraction, the answer is 117/70
- In mixed form: 147/70
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