Subtract 90/40 from 1/30
1st number: 1/30, 2nd number: 2 10/40
1/30 - 90/40 is -133/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
1/30 = 1 × 4/30 × 4 = 4/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
90/40 = 90 × 3/40 × 3 = 270/120 - Subtract the two like fractions:
4/120 - 270/120 = 4 - 270/120 = -266/120 - After reducing the fraction, the answer is -133/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30-90/40 1/60-90/40 1/30-90/80 3/30-90/40 1/90-90/40 5/30-90/40 7/30-90/40