Subtract 2/10 from 40/21
1st number: 1 19/21, 2nd number: 2/10
40/21 - 2/10 is 179/105.
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,
2/10 = 2 × 21/10 × 21 = 42/210 - Subtract the two like fractions:
400/210 - 42/210 = 400 - 42/210 = 358/210 - After reducing the fraction, the answer is 179/105
- In mixed form: 174/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21-2/10 40/21-4/10 40/42-2/10 40/21-2/20 40/21-6/10 40/63-2/10 40/21-2/30 40/21-2/50 40/21-14/10 40/21-2/70