Subtract 5/30 from 4/40
4/40 - 5/30 is -1/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
4/40 = 4 × 3/40 × 3 = 12/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
5/30 = 5 × 4/30 × 4 = 20/120 - Subtract the two like fractions:
12/120 - 20/120 = 12 - 20/120 = -8/120 - After reducing the fraction, the answer is -1/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/40-5/30 4/40-10/30 4/80-5/30 4/40-5/60 12/40-5/30 4/40-15/30 4/40-5/90 20/40-5/30 4/40-25/30 28/40-5/30 4/40-35/30