Subtract 9/14 from 15/90
15/90 - 9/14 is -10/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 14 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Likewise, for the 2nd fraction, since 14 × 45 = 630,
9/14 = 9 × 45/14 × 45 = 405/630 - Subtract the two like fractions:
105/630 - 405/630 = 105 - 405/630 = -300/630 - After reducing the fraction, the answer is -10/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90-9/14 15/90-18/14 15/90-9/28 45/90-9/14 15/90-27/14 15/90-9/42 75/90-9/14 15/90-45/14 15/90-9/70 15/90-63/14 15/90-9/98