Subtract 28/30 from 9/63
9/63 - 28/30 is -83/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 30 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
9/63 = 9 × 10/63 × 10 = 90/630 - Likewise, for the 2nd fraction, since 30 × 21 = 630,
28/30 = 28 × 21/30 × 21 = 588/630 - Subtract the two like fractions:
90/630 - 588/630 = 90 - 588/630 = -498/630 - After reducing the fraction, the answer is -83/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/63-28/30 9/63-56/30 9/63-28/60 27/63-28/30 9/63-84/30 9/63-28/90 45/63-28/30