Subtract 21/48 from 90/12
1st number: 7 6/12, 2nd number: 21/48
90/12 - 21/48 is 113/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 48 is 48
Next, find the equivalent fraction of both fractional numbers with denominator 48 - For the 1st fraction, since 12 × 4 = 48,
90/12 = 90 × 4/12 × 4 = 360/48 - Likewise, for the 2nd fraction, since 48 × 1 = 48,
21/48 = 21 × 1/48 × 1 = 21/48 - Subtract the two like fractions:
360/48 - 21/48 = 360 - 21/48 = 339/48 - After reducing the fraction, the answer is 113/16
- In mixed form: 71/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-42/48 90/24-21/48 90/12-21/96 90/12-63/48 90/36-21/48 90/60-21/48 90/84-21/48