Subtract 36/40 from 3/70
3/70 - 36/40 is -6/7.
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,
3/70 = 3 × 4/70 × 4 = 12/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
36/40 = 36 × 7/40 × 7 = 252/280 - Subtract the two like fractions:
12/280 - 252/280 = 12 - 252/280 = -240/280 - After reducing the fraction, the answer is -6/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/70-36/40 3/70-72/40 3/70-36/80 9/70-36/40 15/70-36/40 21/70-36/40