Subtract 98/40 from 7/84
1st number: 7/84, 2nd number: 2 18/40
7/84 - 98/40 is -71/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
7/84 = 7 × 10/84 × 10 = 70/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
98/40 = 98 × 21/40 × 21 = 2058/840 - Subtract the two like fractions:
70/840 - 2058/840 = 70 - 2058/840 = -1988/840 - After reducing the fraction, the answer is -71/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-98/40 7/84-98/80 21/84-98/40 35/84-98/40 49/84-98/40