Subtract 30/90 from 18/14
1st number: 1 4/14, 2nd number: 30/90
18/14 - 30/90 is 20/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 14 × 45 = 630,
18/14 = 18 × 45/14 × 45 = 810/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
30/90 = 30 × 7/90 × 7 = 210/630 - Subtract the two like fractions:
810/630 - 210/630 = 810 - 210/630 = 600/630 - After reducing the fraction, the answer is 20/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/14-30/90 18/14-60/90 18/28-30/90 54/14-30/90 18/42-30/90 90/14-30/90 18/70-30/90 18/98-30/90