Subtract 1/20 from 8/10
8/10 - 1/20 is 3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
8/10 = 8 × 2/10 × 2 = 16/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
1/20 = 1 × 1/20 × 1 = 1/20 - Subtract the two like fractions:
16/20 - 1/20 = 16 - 1/20 = 15/20 - After reducing the fraction, the answer is 3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10-1/20 8/10-2/20 8/20-1/20 8/10-1/40 24/10-1/20 8/10-3/20 8/30-1/20 8/10-1/60 40/10-1/20 8/10-5/20 8/50-1/20 56/10-1/20 8/10-7/20 8/70-1/20