Subtract 56/63 from 42/30
1st number: 1 12/30, 2nd number: 56/63
42/30 - 56/63 is 23/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
42/30 = 42 × 21/30 × 21 = 882/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
56/63 = 56 × 10/63 × 10 = 560/630 - Subtract the two like fractions:
882/630 - 560/630 = 882 - 560/630 = 322/630 - After reducing the fraction, the answer is 23/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-56/63 42/60-56/63 42/90-56/63