Subtract 42/90 from 40/6
1st number: 6 4/6, 2nd number: 42/90
40/6 - 42/90 is 31/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 6 × 15 = 90,
40/6 = 40 × 15/6 × 15 = 600/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Subtract the two like fractions:
600/90 - 42/90 = 600 - 42/90 = 558/90 - After reducing the fraction, the answer is 31/5
- In mixed form: 61/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/6-42/90 40/6-84/90 40/12-42/90 40/18-42/90 40/30-42/90 40/42-42/90