Subtract 21/90 from 28/24
1st number: 1 4/24, 2nd number: 21/90
28/24 - 21/90 is 14/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
28/24 = 28 × 15/24 × 15 = 420/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
21/90 = 21 × 4/90 × 4 = 84/360 - Subtract the two like fractions:
420/360 - 84/360 = 420 - 84/360 = 336/360 - After reducing the fraction, the answer is 14/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/24-21/90 28/24-42/90 28/48-21/90 84/24-21/90 28/24-63/90 28/72-21/90