Add 18/20 and 10/84
18/20 + 10/84 is 107/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
18/20 = 18 × 21/20 × 21 = 378/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
10/84 = 10 × 5/84 × 5 = 50/420 - Add the two like fractions:
378/420 + 50/420 = 378 + 50/420 = 428/420 - 428/420 simplified gives 107/105
- So, 18/20 + 10/84 = 107/105
In mixed form: 12/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+10/84 18/20+20/84 18/40+10/84 54/20+10/84 18/20+30/84 18/60+10/84 90/20+10/84 18/20+50/84 18/20+70/84