Subtract 10/63 from 81/30
1st number: 2 21/30, 2nd number: 10/63
81/30 - 10/63 is 1601/630.
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,
81/30 = 81 × 21/30 × 21 = 1701/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
10/63 = 10 × 10/63 × 10 = 100/630 - Subtract the two like fractions:
1701/630 - 100/630 = 1701 - 100/630 = 1601/630 - In mixed form: 2341/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30-20/63 81/60-10/63 81/30-30/63 81/90-10/63 81/30-50/63 81/30-70/63