Subtract 42/7 from 5/40
1st number: 5/40, 2nd number: 6 0/7
5/40 - 42/7 is -47/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
5/40 = 5 × 7/40 × 7 = 35/280 - Likewise, for the 2nd fraction, since 7 × 40 = 280,
42/7 = 42 × 40/7 × 40 = 1680/280 - Subtract the two like fractions:
35/280 - 1680/280 = 35 - 1680/280 = -1645/280 - After reducing the fraction, the answer is -47/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/40-42/7 5/40-84/7 5/80-42/7 5/40-42/14 15/40-42/7 5/40-42/21 25/40-42/7 5/40-42/35 35/40-42/7 5/40-42/49