Add 80/90 and 90/84
1st number: 80/90, 2nd number: 1 6/84
80/90 + 90/84 is 247/126.
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,
80/90 = 80 × 14/90 × 14 = 1120/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
90/84 = 90 × 15/84 × 15 = 1350/1260 - Add the two like fractions:
1120/1260 + 1350/1260 = 1120 + 1350/1260 = 2470/1260 - 2470/1260 simplified gives 247/126
- So, 80/90 + 90/84 = 247/126
In mixed form: 1121/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: