Subtract 81/40 from 16/70
1st number: 16/70, 2nd number: 2 1/40
16/70 - 81/40 is -503/280.
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,
16/70 = 16 × 4/70 × 4 = 64/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
81/40 = 81 × 7/40 × 7 = 567/280 - Subtract the two like fractions:
64/280 - 567/280 = 64 - 567/280 = -503/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/70-81/40 16/70-81/80 48/70-81/40 80/70-81/40