Subtract 90/40 from 24/30
1st number: 24/30, 2nd number: 2 10/40
24/30 - 90/40 is -29/20.
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,
24/30 = 24 × 4/30 × 4 = 96/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
90/40 = 90 × 3/40 × 3 = 270/120 - Subtract the two like fractions:
96/120 - 270/120 = 96 - 270/120 = -174/120 - After reducing the fraction, the answer is -29/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/30-90/40 24/60-90/40 24/30-90/80 72/30-90/40 24/90-90/40