Subtract 18/48 from 28/90
28/90 - 18/48 is -23/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 48 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
28/90 = 28 × 8/90 × 8 = 224/720 - Likewise, for the 2nd fraction, since 48 × 15 = 720,
18/48 = 18 × 15/48 × 15 = 270/720 - Subtract the two like fractions:
224/720 - 270/720 = 224 - 270/720 = -46/720 - After reducing the fraction, the answer is -23/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90-18/48 28/90-36/48 28/90-18/96 84/90-18/48 28/90-54/48 28/90-90/48