Subtract 90/6 from 30/40
1st number: 30/40, 2nd number: 15 0/6
30/40 - 90/6 is -57/4.
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,
30/40 = 30 × 3/40 × 3 = 90/120 - Likewise, for the 2nd fraction, since 6 × 20 = 120,
90/6 = 90 × 20/6 × 20 = 1800/120 - Subtract the two like fractions:
90/120 - 1800/120 = 90 - 1800/120 = -1710/120 - After reducing the fraction, the answer is -57/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40-90/6 30/80-90/6 30/40-90/12 90/40-90/6 30/40-90/18 30/40-90/30 30/40-90/42