Subtract 28/70 from 45/50
45/50 - 28/70 is 1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 70 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 50 × 7 = 350,
45/50 = 45 × 7/50 × 7 = 315/350 - Likewise, for the 2nd fraction, since 70 × 5 = 350,
28/70 = 28 × 5/70 × 5 = 140/350 - Subtract the two like fractions:
315/350 - 140/350 = 315 - 140/350 = 175/350 - After reducing the fraction, the answer is 1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/50-28/70 45/50-56/70 45/50-84/70