Subtract 40/10 from 28/70
1st number: 28/70, 2nd number: 4 0/10
28/70 - 40/10 is -18/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
28/70 = 28 × 1/70 × 1 = 28/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
40/10 = 40 × 7/10 × 7 = 280/70 - Subtract the two like fractions:
28/70 - 280/70 = 28 - 280/70 = -252/70 - After reducing the fraction, the answer is -18/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70-40/10 28/70-80/10 28/70-40/20 84/70-40/10 28/70-40/30 28/70-40/50 28/70-40/70