Subtract 45/14 from 15/90
1st number: 15/90, 2nd number: 3 3/14
15/90 - 45/14 is -64/21.
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,
45/14 = 45 × 45/14 × 45 = 2025/630 - Subtract the two like fractions:
105/630 - 2025/630 = 105 - 2025/630 = -1920/630 - After reducing the fraction, the answer is -64/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90-45/14 15/90-90/14 15/90-45/28 45/90-45/14 15/90-45/42 75/90-45/14 15/90-45/70 15/90-45/98