Add 5/90 and 70/84
5/90 + 70/84 is 8/9.
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,
5/90 = 5 × 14/90 × 14 = 70/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
70/84 = 70 × 15/84 × 15 = 1050/1260 - Add the two like fractions:
70/1260 + 1050/1260 = 70 + 1050/1260 = 1120/1260 - 1120/1260 simplified gives 8/9
- So, 5/90 + 70/84 = 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/90+70/84 15/90+70/84 25/90+70/84 35/90+70/84