Subtract 18/48 from 28/45
28/45 - 18/48 is 89/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 48 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
28/45 = 28 × 16/45 × 16 = 448/720 - Likewise, for the 2nd fraction, since 48 × 15 = 720,
18/48 = 18 × 15/48 × 15 = 270/720 - Subtract the two like fractions:
448/720 - 270/720 = 448 - 270/720 = 178/720 - After reducing the fraction, the answer is 89/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/45-18/48 28/45-36/48 28/90-18/48 28/45-18/96 84/45-18/48 28/45-54/48 28/45-90/48