Subtract 20/6 from 90/40
1st number: 2 10/40, 2nd number: 3 2/6
90/40 - 20/6 is -13/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 6 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
90/40 = 90 × 3/40 × 3 = 270/120 - Likewise, for the 2nd fraction, since 6 × 20 = 120,
20/6 = 20 × 20/6 × 20 = 400/120 - Subtract the two like fractions:
270/120 - 400/120 = 270 - 400/120 = -130/120 - After reducing the fraction, the answer is -13/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40-40/6 90/80-20/6 90/40-20/12 90/40-60/6 90/40-20/18 90/40-20/30 90/40-20/42