Subtract 90/6 from 20/40
1st number: 20/40, 2nd number: 15 0/6
20/40 - 90/6 is -29/2.
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,
20/40 = 20 × 3/40 × 3 = 60/120 - Likewise, for the 2nd fraction, since 6 × 20 = 120,
90/6 = 90 × 20/6 × 20 = 1800/120 - Subtract the two like fractions:
60/120 - 1800/120 = 60 - 1800/120 = -1740/120 - After reducing the fraction, the answer is -29/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/80-90/6 20/40-90/12 60/40-90/6 20/40-90/18 20/40-90/30 20/40-90/42