Subtract 28/10 from 70/80
1st number: 70/80, 2nd number: 2 8/10
70/80 - 28/10 is -77/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 10 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
70/80 = 70 × 1/80 × 1 = 70/80 - Likewise, for the 2nd fraction, since 10 × 8 = 80,
28/10 = 28 × 8/10 × 8 = 224/80 - Subtract the two like fractions:
70/80 - 224/80 = 70 - 224/80 = -154/80 - After reducing the fraction, the answer is -77/40
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