Subtract 18/5 from 28/63
1st number: 28/63, 2nd number: 3 3/5
28/63 - 18/5 is -142/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 5 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
28/63 = 28 × 5/63 × 5 = 140/315 - Likewise, for the 2nd fraction, since 5 × 63 = 315,
18/5 = 18 × 63/5 × 63 = 1134/315 - Subtract the two like fractions:
140/315 - 1134/315 = 140 - 1134/315 = -994/315 - After reducing the fraction, the answer is -142/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/63-18/5 28/63-36/5 28/63-18/10 84/63-18/5 28/63-54/5 28/63-18/15 28/63-90/5 28/63-18/25 28/63-18/35