Subtract 5/21 from 90/63
1st number: 1 27/63, 2nd number: 5/21
90/63 - 5/21 is 25/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
90/63 = 90 × 1/63 × 1 = 90/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
5/21 = 5 × 3/21 × 3 = 15/63 - Subtract the two like fractions:
90/63 - 15/63 = 90 - 15/63 = 75/63 - After reducing the fraction, the answer is 25/21
- In mixed form: 14/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/63-10/21 90/63-5/42 90/63-15/21 90/63-5/63 90/63-25/21 90/63-35/21