Subtract 28/7 from 90/24
1st number: 3 18/24, 2nd number: 4 0/7
90/24 - 28/7 is -1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 7 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
90/24 = 90 × 7/24 × 7 = 630/168 - Likewise, for the 2nd fraction, since 7 × 24 = 168,
28/7 = 28 × 24/7 × 24 = 672/168 - Subtract the two like fractions:
630/168 - 672/168 = 630 - 672/168 = -42/168 - After reducing the fraction, the answer is -1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/24-56/7 90/48-28/7 90/24-28/14 90/24-84/7 90/72-28/7 90/24-28/21 90/24-28/35 90/24-28/49