Subtract 50/21 from 90/4
1st number: 22 2/4, 2nd number: 2 8/21
90/4 - 50/21 is 845/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
90/4 = 90 × 21/4 × 21 = 1890/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
50/21 = 50 × 4/21 × 4 = 200/84 - Subtract the two like fractions:
1890/84 - 200/84 = 1890 - 200/84 = 1690/84 - After reducing the fraction, the answer is 845/42
- In mixed form: 205/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/8-50/21 90/4-50/42 90/12-50/21 90/4-50/63 90/20-50/21 90/28-50/21