Subtract 18/40 from 90/2
1st number: 45 0/2, 2nd number: 18/40
90/2 - 18/40 is 891/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 2 × 20 = 40,
90/2 = 90 × 20/2 × 20 = 1800/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
18/40 = 18 × 1/40 × 1 = 18/40 - Subtract the two like fractions:
1800/40 - 18/40 = 1800 - 18/40 = 1782/40 - After reducing the fraction, the answer is 891/20
- In mixed form: 4411/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2-36/40 90/4-18/40 90/2-18/80 90/2-54/40 90/6-18/40 90/2-90/40 90/10-18/40 90/14-18/40