Add 18/90 and 5/84
18/90 + 5/84 is 109/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 84 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
18/90 = 18 × 14/90 × 14 = 252/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
5/84 = 5 × 15/84 × 15 = 75/1260 - Add the two like fractions:
252/1260 + 75/1260 = 252 + 75/1260 = 327/1260 - 327/1260 simplified gives 109/420
- So, 18/90 + 5/84 = 109/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/90+5/84 18/90+10/84 54/90+5/84 18/90+15/84 18/90+25/84 18/90+35/84