Subtract 70/8 from 28/30
1st number: 28/30, 2nd number: 8 6/8
28/30 - 70/8 is -469/60.
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,
70/8 = 70 × 15/8 × 15 = 1050/120 - Subtract the two like fractions:
112/120 - 1050/120 = 112 - 1050/120 = -938/120 - After reducing the fraction, the answer is -469/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30-70/8 28/60-70/8 28/30-70/16 84/30-70/8 28/90-70/8 28/30-70/24 28/30-70/40 28/30-70/56