Subtract 20/50 from 3/28
3/28 - 20/50 is -41/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 50 is 700
Next, find the equivalent fraction of both fractional numbers with denominator 700 - For the 1st fraction, since 28 × 25 = 700,
3/28 = 3 × 25/28 × 25 = 75/700 - Likewise, for the 2nd fraction, since 50 × 14 = 700,
20/50 = 20 × 14/50 × 14 = 280/700 - Subtract the two like fractions:
75/700 - 280/700 = 75 - 280/700 = -205/700 - After reducing the fraction, the answer is -41/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/28-20/50 3/28-40/50 3/56-20/50 9/28-20/50 3/28-60/50 3/84-20/50 15/28-20/50 21/28-20/50