Subtract 8/30 from 4/40
4/40 - 8/30 is -1/6.
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,
8/30 = 8 × 4/30 × 4 = 32/120 - Subtract the two like fractions:
12/120 - 32/120 = 12 - 32/120 = -20/120 - After reducing the fraction, the answer is -1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/40-8/30 4/40-16/30 4/80-8/30 4/40-8/60 12/40-8/30 4/40-24/30 4/40-8/90 20/40-8/30 4/40-40/30 28/40-8/30 4/40-56/30