Subtract 10/5 from 30/40
1st number: 30/40, 2nd number: 2 0/5
30/40 - 10/5 is -5/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
30/40 = 30 × 1/40 × 1 = 30/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
10/5 = 10 × 8/5 × 8 = 80/40 - Subtract the two like fractions:
30/40 - 80/40 = 30 - 80/40 = -50/40 - After reducing the fraction, the answer is -5/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40-10/5 30/40-20/5 30/80-10/5 90/40-10/5 30/40-30/5 30/40-10/15 30/40-50/5 30/40-10/25 30/40-70/5 30/40-10/35