Subtract 27/28 from 42/50
42/50 - 27/28 is -87/700.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 28 is 700
Next, find the equivalent fraction of both fractional numbers with denominator 700 - For the 1st fraction, since 50 × 14 = 700,
42/50 = 42 × 14/50 × 14 = 588/700 - Likewise, for the 2nd fraction, since 28 × 25 = 700,
27/28 = 27 × 25/28 × 25 = 675/700 - Subtract the two like fractions:
588/700 - 675/700 = 588 - 675/700 = -87/700
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/50-27/28 42/50-54/28 42/50-27/56 42/50-81/28 42/50-27/84