Subtract 98/40 from 63/84
1st number: 63/84, 2nd number: 2 18/40
63/84 - 98/40 is -17/10.
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,
63/84 = 63 × 10/84 × 10 = 630/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
98/40 = 98 × 21/40 × 21 = 2058/840 - Subtract the two like fractions:
630/840 - 2058/840 = 630 - 2058/840 = -1428/840 - After reducing the fraction, the answer is -17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/84-98/80