Subtract 2/45 from 81/63
1st number: 1 18/63, 2nd number: 2/45
81/63 - 2/45 is 391/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
81/63 = 81 × 5/63 × 5 = 405/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
2/45 = 2 × 7/45 × 7 = 14/315 - Subtract the two like fractions:
405/315 - 14/315 = 405 - 14/315 = 391/315 - In mixed form: 176/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/63-4/45 81/63-2/90 81/63-6/45 81/63-10/45 81/63-14/45