Subtract 70/80 from 15/70
15/70 - 70/80 is -37/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
15/70 = 15 × 8/70 × 8 = 120/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
70/80 = 70 × 7/80 × 7 = 490/560 - Subtract the two like fractions:
120/560 - 490/560 = 120 - 490/560 = -370/560 - After reducing the fraction, the answer is -37/56
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