Subtract 16/40 from 8/70
8/70 - 16/40 is -2/7.
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,
8/70 = 8 × 4/70 × 4 = 32/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
16/40 = 16 × 7/40 × 7 = 112/280 - Subtract the two like fractions:
32/280 - 112/280 = 32 - 112/280 = -80/280 - After reducing the fraction, the answer is -2/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/70-16/40 8/70-32/40 8/70-16/80 24/70-16/40 8/70-48/40 40/70-16/40 8/70-80/40 56/70-16/40