Subtract 20/10 from 40/90
1st number: 40/90, 2nd number: 2 0/10
40/90 - 20/10 is -14/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
40/90 = 40 × 1/90 × 1 = 40/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
20/10 = 20 × 9/10 × 9 = 180/90 - Subtract the two like fractions:
40/90 - 180/90 = 40 - 180/90 = -140/90 - After reducing the fraction, the answer is -14/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90-20/10 40/90-40/10 40/90-60/10 40/90-20/30 40/90-20/50 40/90-20/70