Subtract 84/80 from 15/70
1st number: 15/70, 2nd number: 1 4/80
15/70 - 84/80 is -117/140.
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,
84/80 = 84 × 7/80 × 7 = 588/560 - Subtract the two like fractions:
120/560 - 588/560 = 120 - 588/560 = -468/560 - After reducing the fraction, the answer is -117/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/70-84/80 45/70-84/80 75/70-84/80