Subtract 90/63 from 15/9
1st number: 1 6/9, 2nd number: 1 27/63
15/9 - 90/63 is 5/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
15/9 = 15 × 7/9 × 7 = 105/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
90/63 = 90 × 1/63 × 1 = 90/63 - Subtract the two like fractions:
105/63 - 90/63 = 105 - 90/63 = 15/63 - After reducing the fraction, the answer is 5/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9-90/63 15/18-90/63 45/9-90/63 15/27-90/63 75/9-90/63 15/45-90/63 15/63-90/63