Subtract 20/28 from 90/2
1st number: 45 0/2, 2nd number: 20/28
90/2 - 20/28 is 310/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 2 × 14 = 28,
90/2 = 90 × 14/2 × 14 = 1260/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
20/28 = 20 × 1/28 × 1 = 20/28 - Subtract the two like fractions:
1260/28 - 20/28 = 1260 - 20/28 = 1240/28 - After reducing the fraction, the answer is 310/7
- In mixed form: 442/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2-40/28 90/4-20/28 90/2-20/56 90/2-60/28 90/6-20/28 90/2-20/84 90/10-20/28 90/14-20/28