Add 18/84 and 9/20
18/84 + 9/20 is 93/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
18/84 = 18 × 5/84 × 5 = 90/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
9/20 = 9 × 21/20 × 21 = 189/420 - Add the two like fractions:
90/420 + 189/420 = 90 + 189/420 = 279/420 - 279/420 simplified gives 93/140
- So, 18/84 + 9/20 = 93/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/84+9/20 18/84+18/20 18/84+9/40 54/84+9/20 18/84+27/20 18/84+9/60 90/84+9/20 18/84+45/20 18/84+63/20