Add 84/4 and 18/20
1st number: 21 0/4, 2nd number: 18/20
84/4 + 18/20 is 219/10.
Steps for adding 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,
18/20 = 18 × 1/20 × 1 = 18/20 - Add the two like fractions:
420/20 + 18/20 = 420 + 18/20 = 438/20 - 438/20 simplified gives 219/10
- So, 84/4 + 18/20 = 219/10
In mixed form: 219/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4+36/20 84/8+18/20 84/4+18/40 84/4+54/20 84/12+18/20 84/4+18/60 84/4+90/20 84/20+18/20 84/28+18/20