Subtract 63/40 from 8/30
1st number: 8/30, 2nd number: 1 23/40
8/30 - 63/40 is -157/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
8/30 = 8 × 4/30 × 4 = 32/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
63/40 = 63 × 3/40 × 3 = 189/120 - Subtract the two like fractions:
32/120 - 189/120 = 32 - 189/120 = -157/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/30-63/40 8/60-63/40 8/30-63/80 24/30-63/40 8/90-63/40 40/30-63/40 56/30-63/40