Add 12/84 and 5/90
12/84 + 5/90 is 25/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
12/84 = 12 × 15/84 × 15 = 180/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
5/90 = 5 × 14/90 × 14 = 70/1260 - Add the two like fractions:
180/1260 + 70/1260 = 180 + 70/1260 = 250/1260 - 250/1260 simplified gives 25/126
- So, 12/84 + 5/90 = 25/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84+5/90 12/84+10/90 36/84+5/90 12/84+15/90 60/84+5/90 12/84+25/90 12/84+35/90