Subtract 90/21 from 48/4
1st number: 12 0/4, 2nd number: 4 6/21
48/4 - 90/21 is 54/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
48/4 = 48 × 21/4 × 21 = 1008/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
90/21 = 90 × 4/21 × 4 = 360/84 - Subtract the two like fractions:
1008/84 - 360/84 = 1008 - 360/84 = 648/84 - After reducing the fraction, the answer is 54/7
- In mixed form: 75/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 96/4-90/21 48/8-90/21 48/4-90/42 48/12-90/21 48/4-90/63 48/20-90/21 48/28-90/21