Subtract 9/10 from 70/80
70/80 - 9/10 is -1/40.
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,
9/10 = 9 × 8/10 × 8 = 72/80 - Subtract the two like fractions:
70/80 - 72/80 = 70 - 72/80 = -2/80 - After reducing the fraction, the answer is -1/40
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