Subtract 8/30 from 1/40
1/40 - 8/30 is -29/120.
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,
1/40 = 1 × 3/40 × 3 = 3/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
8/30 = 8 × 4/30 × 4 = 32/120 - Subtract the two like fractions:
3/120 - 32/120 = 3 - 32/120 = -29/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/40-8/30 1/40-16/30 1/80-8/30 1/40-8/60 3/40-8/30 1/40-24/30 1/40-8/90 5/40-8/30 1/40-40/30 7/40-8/30 1/40-56/30