Subtract 84/63 from 8/15
1st number: 8/15, 2nd number: 1 21/63
8/15 - 84/63 is -4/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 15 × 21 = 315,
8/15 = 8 × 21/15 × 21 = 168/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
84/63 = 84 × 5/63 × 5 = 420/315 - Subtract the two like fractions:
168/315 - 420/315 = 168 - 420/315 = -252/315 - After reducing the fraction, the answer is -4/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/15-84/63 8/30-84/63 24/15-84/63 8/45-84/63 40/15-84/63 8/75-84/63 56/15-84/63