Subtract 84/35 from 21/4
1st number: 5 1/4, 2nd number: 2 14/35
21/4 - 84/35 is 57/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 4 × 35 = 140,
21/4 = 21 × 35/4 × 35 = 735/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
84/35 = 84 × 4/35 × 4 = 336/140 - Subtract the two like fractions:
735/140 - 336/140 = 735 - 336/140 = 399/140 - After reducing the fraction, the answer is 57/20
- In mixed form: 217/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4-84/35 21/8-84/35 21/4-84/70 63/4-84/35 21/12-84/35 21/20-84/35 21/28-84/35