Subtract 27/50 from 28/70
28/70 - 27/50 is -7/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 50 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 70 × 5 = 350,
28/70 = 28 × 5/70 × 5 = 140/350 - Likewise, for the 2nd fraction, since 50 × 7 = 350,
27/50 = 27 × 7/50 × 7 = 189/350 - Subtract the two like fractions:
140/350 - 189/350 = 140 - 189/350 = -49/350 - After reducing the fraction, the answer is -7/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70-27/50 28/70-54/50 84/70-27/50 28/70-81/50