Subtract 30/90 from 40/15
1st number: 2 10/15, 2nd number: 30/90
40/15 - 30/90 is 7/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
40/15 = 40 × 6/15 × 6 = 240/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
30/90 = 30 × 1/90 × 1 = 30/90 - Subtract the two like fractions:
240/90 - 30/90 = 240 - 30/90 = 210/90 - After reducing the fraction, the answer is 7/3
- In mixed form: 21/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/15-30/90 40/15-60/90 40/30-30/90 40/45-30/90 40/75-30/90