Subtract 98/80 from 7/84
1st number: 7/84, 2nd number: 1 18/80
7/84 - 98/80 is -137/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 84 × 20 = 1680,
7/84 = 7 × 20/84 × 20 = 140/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
98/80 = 98 × 21/80 × 21 = 2058/1680 - Subtract the two like fractions:
140/1680 - 2058/1680 = 140 - 2058/1680 = -1918/1680 - After reducing the fraction, the answer is -137/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-98/80 21/84-98/80 35/84-98/80 49/84-98/80