Subtract 84/80 from 3/7
1st number: 3/7, 2nd number: 1 4/80
3/7 - 84/80 is -87/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
3/7 = 3 × 80/7 × 80 = 240/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
84/80 = 84 × 7/80 × 7 = 588/560 - Subtract the two like fractions:
240/560 - 588/560 = 240 - 588/560 = -348/560 - After reducing the fraction, the answer is -87/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-84/80 3/14-84/80 9/7-84/80 3/21-84/80 15/7-84/80 3/35-84/80 21/7-84/80 3/49-84/80