Add 1/90 and 45/84
1/90 + 45/84 is 689/1260.
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,
1/90 = 1 × 14/90 × 14 = 14/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
45/84 = 45 × 15/84 × 15 = 675/1260 - Add the two like fractions:
14/1260 + 675/1260 = 14 + 675/1260 = 689/1260 - So, 1/90 + 45/84 = 689/1260
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90+45/84 1/90+90/84 3/90+45/84 5/90+45/84 7/90+45/84