Subtract 72/90 from 40/6
1st number: 6 4/6, 2nd number: 72/90
40/6 - 72/90 is 88/15.
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,
72/90 = 72 × 1/90 × 1 = 72/90 - Subtract the two like fractions:
600/90 - 72/90 = 600 - 72/90 = 528/90 - After reducing the fraction, the answer is 88/15
- In mixed form: 513/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/6-72/90 40/12-72/90 40/18-72/90 40/30-72/90 40/42-72/90