Subtract 24/10 from 40/21
1st number: 1 19/21, 2nd number: 2 4/10
40/21 - 24/10 is -52/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
40/21 = 40 × 10/21 × 10 = 400/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
24/10 = 24 × 21/10 × 21 = 504/210 - Subtract the two like fractions:
400/210 - 504/210 = 400 - 504/210 = -104/210 - After reducing the fraction, the answer is -52/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21-24/10 40/21-48/10 40/42-24/10 40/21-24/20 40/21-72/10 40/63-24/10 40/21-24/30 40/21-24/50 40/21-24/70