Subtract 90/36 from 28/14
1st number: 2 0/14, 2nd number: 2 18/36
28/14 - 90/36 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 14 × 18 = 252,
28/14 = 28 × 18/14 × 18 = 504/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
90/36 = 90 × 7/36 × 7 = 630/252 - Subtract the two like fractions:
504/252 - 630/252 = 504 - 630/252 = -126/252 - 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: 56/14-90/36 28/14-90/72 84/14-90/36 28/42-90/36 28/70-90/36 28/98-90/36