Subtract 18/80 from 70/40
1st number: 1 30/40, 2nd number: 18/80
70/40 - 18/80 is 61/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
70/40 = 70 × 2/40 × 2 = 140/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
18/80 = 18 × 1/80 × 1 = 18/80 - Subtract the two like fractions:
140/80 - 18/80 = 140 - 18/80 = 122/80 - After reducing the fraction, the answer is 61/40
- In mixed form: 121/40
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