Add 9/84 and 8/90
9/84 + 8/90 is 247/1260.
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,
8/90 = 8 × 14/90 × 14 = 112/1260 - Add the two like fractions:
135/1260 + 112/1260 = 135 + 112/1260 = 247/1260 - So, 9/84 + 8/90 = 247/1260
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/84+8/90 9/84+16/90 27/84+8/90 9/84+24/90 45/84+8/90 9/84+40/90 63/84+8/90 9/84+56/90