Subtract 40/10 from 42/27
1st number: 1 15/27, 2nd number: 4 0/10
42/27 - 40/10 is -22/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 10 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
42/27 = 42 × 10/27 × 10 = 420/270 - Likewise, for the 2nd fraction, since 10 × 27 = 270,
40/10 = 40 × 27/10 × 27 = 1080/270 - Subtract the two like fractions:
420/270 - 1080/270 = 420 - 1080/270 = -660/270 - After reducing the fraction, the answer is -22/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/27-40/10 42/27-80/10 42/54-40/10 42/27-40/20 42/81-40/10 42/27-40/30 42/27-40/50 42/27-40/70