Subtract 15/40 from 6/70
6/70 - 15/40 is -81/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
6/70 = 6 × 4/70 × 4 = 24/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Subtract the two like fractions:
24/280 - 105/280 = 24 - 105/280 = -81/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/70-15/40 6/70-30/40 6/70-15/80 18/70-15/40 6/70-45/40 30/70-15/40 6/70-75/40 42/70-15/40