Add 18/84 and 25/30
18/84 + 25/30 is 22/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 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 30 × 14 = 420,
25/30 = 25 × 14/30 × 14 = 350/420 - Add the two like fractions:
90/420 + 350/420 = 90 + 350/420 = 440/420 - 440/420 simplified gives 22/21
- So, 18/84 + 25/30 = 22/21
In mixed form: 11/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/84+25/30 18/84+50/30 18/84+25/60 54/84+25/30 18/84+75/30 18/84+25/90 90/84+25/30