Subtract 40/8 from 42/27
1st number: 1 15/27, 2nd number: 5 0/8
42/27 - 40/8 is -31/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 8 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 27 × 8 = 216,
42/27 = 42 × 8/27 × 8 = 336/216 - Likewise, for the 2nd fraction, since 8 × 27 = 216,
40/8 = 40 × 27/8 × 27 = 1080/216 - Subtract the two like fractions:
336/216 - 1080/216 = 336 - 1080/216 = -744/216 - After reducing the fraction, the answer is -31/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/27-40/8 42/27-80/8 42/54-40/8 42/27-40/16 42/81-40/8 42/27-40/24 42/27-40/56