Subtract 98/5 from 21/40
1st number: 21/40, 2nd number: 19 3/5
21/40 - 98/5 is -763/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
98/5 = 98 × 8/5 × 8 = 784/40 - Subtract the two like fractions:
21/40 - 784/40 = 21 - 784/40 = -763/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40-98/5 21/80-98/5 21/40-98/10 63/40-98/5 21/40-98/15 21/40-98/25 21/40-98/35