Subtract 4/10 from 20/40
20/40 - 4/10 is 1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
20/40 = 20 × 1/40 × 1 = 20/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
4/10 = 4 × 4/10 × 4 = 16/40 - Subtract the two like fractions:
20/40 - 16/40 = 20 - 16/40 = 4/40 - After reducing the fraction, the answer is 1/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-8/10 20/80-4/10 20/40-4/20 60/40-4/10 20/40-12/10 20/40-4/30 20/40-20/10 20/40-4/50 20/40-28/10 20/40-4/70