Subtract 15/12 from 70/80
1st number: 70/80, 2nd number: 1 3/12
70/80 - 15/12 is -3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 12 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
70/80 = 70 × 3/80 × 3 = 210/240 - Likewise, for the 2nd fraction, since 12 × 20 = 240,
15/12 = 15 × 20/12 × 20 = 300/240 - Subtract the two like fractions:
210/240 - 300/240 = 210 - 300/240 = -90/240 - After reducing the fraction, the answer is -3/8
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