Subtract 48/45 from 21/4
1st number: 5 1/4, 2nd number: 1 3/45
21/4 - 48/45 is 251/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
21/4 = 21 × 45/4 × 45 = 945/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
48/45 = 48 × 4/45 × 4 = 192/180 - Subtract the two like fractions:
945/180 - 192/180 = 945 - 192/180 = 753/180 - After reducing the fraction, the answer is 251/60
- In mixed form: 411/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4-48/45 21/4-96/45 21/8-48/45 21/4-48/90 63/4-48/45 21/12-48/45 21/20-48/45 21/28-48/45