Subtract 30/20 from 84/4
1st number: 21 0/4, 2nd number: 1 10/20
84/4 - 30/20 is 39/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
84/4 = 84 × 5/4 × 5 = 420/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
30/20 = 30 × 1/20 × 1 = 30/20 - Subtract the two like fractions:
420/20 - 30/20 = 420 - 30/20 = 390/20 - After reducing the fraction, the answer is 39/2
- In mixed form: 191/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-60/20 84/8-30/20 84/4-30/40 84/4-90/20 84/12-30/20 84/4-30/60 84/20-30/20 84/28-30/20