Subtract 84/63 from 21/4
1st number: 5 1/4, 2nd number: 1 21/63
21/4 - 84/63 is 47/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 4 × 63 = 252,
21/4 = 21 × 63/4 × 63 = 1323/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
84/63 = 84 × 4/63 × 4 = 336/252 - Subtract the two like fractions:
1323/252 - 336/252 = 1323 - 336/252 = 987/252 - After reducing the fraction, the answer is 47/12
- In mixed form: 311/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4-84/63 21/8-84/63 63/4-84/63 21/12-84/63 21/20-84/63 21/28-84/63