Subtract 63/8 from 28/30
1st number: 28/30, 2nd number: 7 7/8
28/30 - 63/8 is -833/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
28/30 = 28 × 4/30 × 4 = 112/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
63/8 = 63 × 15/8 × 15 = 945/120 - Subtract the two like fractions:
112/120 - 945/120 = 112 - 945/120 = -833/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30-63/8 28/60-63/8 28/30-63/16 84/30-63/8 28/90-63/8 28/30-63/24 28/30-63/40 28/30-63/56