Subtract 4/90 from 15/63
15/63 - 4/90 is 61/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
15/63 = 15 × 10/63 × 10 = 150/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
4/90 = 4 × 7/90 × 7 = 28/630 - Subtract the two like fractions:
150/630 - 28/630 = 150 - 28/630 = 122/630 - After reducing the fraction, the answer is 61/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/63-4/90 15/63-8/90 45/63-4/90 15/63-12/90 75/63-4/90 15/63-20/90 15/63-28/90