Subtract 90/21 from 27/3
1st number: 9 0/3, 2nd number: 4 6/21
27/3 - 90/21 is 33/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
27/3 = 27 × 7/3 × 7 = 189/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
90/21 = 90 × 1/21 × 1 = 90/21 - Subtract the two like fractions:
189/21 - 90/21 = 189 - 90/21 = 99/21 - After reducing the fraction, the answer is 33/7
- In mixed form: 45/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/3-90/21 27/6-90/21 27/3-90/42 81/3-90/21 27/9-90/21 27/3-90/63 27/15-90/21 27/21-90/21