Add 9/84 and 70/90
9/84 + 70/90 is 223/252.
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,
9/84 = 9 × 15/84 × 15 = 135/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
70/90 = 70 × 14/90 × 14 = 980/1260 - Add the two like fractions:
135/1260 + 980/1260 = 135 + 980/1260 = 1115/1260 - 1115/1260 simplified gives 223/252
- So, 9/84 + 70/90 = 223/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/84+70/90 27/84+70/90 45/84+70/90 63/84+70/90