Subtract 21/27 from 90/15
1st number: 6 0/15, 2nd number: 21/27
90/15 - 21/27 is 47/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 15 × 9 = 135,
90/15 = 90 × 9/15 × 9 = 810/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
21/27 = 21 × 5/27 × 5 = 105/135 - Subtract the two like fractions:
810/135 - 105/135 = 810 - 105/135 = 705/135 - After reducing the fraction, the answer is 47/9
- In mixed form: 52/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15-42/27 90/30-21/27 90/15-21/54 90/15-63/27 90/45-21/27 90/15-21/81 90/75-21/27