Subtract 7/90 from 18/4
1st number: 4 2/4, 2nd number: 7/90
18/4 - 7/90 is 199/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
18/4 = 18 × 45/4 × 45 = 810/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
7/90 = 7 × 2/90 × 2 = 14/180 - Subtract the two like fractions:
810/180 - 14/180 = 810 - 14/180 = 796/180 - After reducing the fraction, the answer is 199/45
- In mixed form: 419/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4-7/90 18/4-14/90 18/8-7/90 54/4-7/90 18/4-21/90 18/12-7/90 90/4-7/90 18/4-35/90 18/20-7/90 18/4-49/90 18/28-7/90