Subtract 18/28 from 90/50
1st number: 1 40/50, 2nd number: 18/28
90/50 - 18/28 is 81/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 28 is 700
Next, find the equivalent fraction of both fractional numbers with denominator 700 - For the 1st fraction, since 50 × 14 = 700,
90/50 = 90 × 14/50 × 14 = 1260/700 - Likewise, for the 2nd fraction, since 28 × 25 = 700,
18/28 = 18 × 25/28 × 25 = 450/700 - Subtract the two like fractions:
1260/700 - 450/700 = 1260 - 450/700 = 810/700 - After reducing the fraction, the answer is 81/70
- In mixed form: 111/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/50-36/28 90/50-18/56 90/50-54/28 90/50-18/84 90/50-90/28