Subtract 9/90 from 30/15
1st number: 2 0/15, 2nd number: 9/90
30/15 - 9/90 is 19/10.
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,
30/15 = 30 × 6/15 × 6 = 180/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
9/90 = 9 × 1/90 × 1 = 9/90 - Subtract the two like fractions:
180/90 - 9/90 = 180 - 9/90 = 171/90 - After reducing the fraction, the answer is 19/10
- In mixed form: 19/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/15-9/90 30/15-18/90 90/15-9/90 30/15-27/90 30/45-9/90 30/15-45/90 30/75-9/90 30/15-63/90