Subtract 30/63 from 81/30
1st number: 2 21/30, 2nd number: 30/63
81/30 - 30/63 is 467/210.
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,
30/63 = 30 × 10/63 × 10 = 300/630 - Subtract the two like fractions:
1701/630 - 300/630 = 1701 - 300/630 = 1401/630 - After reducing the fraction, the answer is 467/210
- In mixed form: 247/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30-60/63 81/60-30/63 81/30-90/63 81/90-30/63