Subtract 9/30 from 45/63
45/63 - 9/30 is 29/70.
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,
45/63 = 45 × 10/63 × 10 = 450/630 - Likewise, for the 2nd fraction, since 30 × 21 = 630,
9/30 = 9 × 21/30 × 21 = 189/630 - Subtract the two like fractions:
450/630 - 189/630 = 450 - 189/630 = 261/630 - After reducing the fraction, the answer is 29/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/63-9/30 45/63-18/30 45/63-9/60 45/63-27/30 45/63-9/90 45/63-45/30 45/63-63/30