Subtract 4/40 from 81/10
1st number: 8 1/10, 2nd number: 4/40
81/10 - 4/40 is 8/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
81/10 = 81 × 4/10 × 4 = 324/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
4/40 = 4 × 1/40 × 1 = 4/40 - Subtract the two like fractions:
324/40 - 4/40 = 324 - 4/40 = 320/40 - After reducing the fraction, the answer is 8/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/10-8/40 81/20-4/40 81/10-4/80 81/10-12/40 81/30-4/40 81/10-20/40 81/50-4/40 81/10-28/40 81/70-4/40