Add 3/84 and 8/90
3/84 + 8/90 is 157/1260.
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,
3/84 = 3 × 15/84 × 15 = 45/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
8/90 = 8 × 14/90 × 14 = 112/1260 - Add the two like fractions:
45/1260 + 112/1260 = 45 + 112/1260 = 157/1260 - So, 3/84 + 8/90 = 157/1260
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/84+8/90 3/84+16/90 9/84+8/90 3/84+24/90 15/84+8/90 3/84+40/90 21/84+8/90 3/84+56/90