Subtract 4/40 from 21/5
1st number: 4 1/5, 2nd number: 4/40
21/5 - 4/40 is 41/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
21/5 = 21 × 8/5 × 8 = 168/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
4/40 = 4 × 1/40 × 1 = 4/40 - Subtract the two like fractions:
168/40 - 4/40 = 168 - 4/40 = 164/40 - After reducing the fraction, the answer is 41/10
- In mixed form: 41/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5-4/40 21/5-8/40 21/10-4/40 21/5-4/80 63/5-4/40 21/5-12/40 21/15-4/40 21/5-20/40 21/25-4/40 21/5-28/40 21/35-4/40