Add 7/84 and 1/90
7/84 + 1/90 is 17/180.
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,
7/84 = 7 × 15/84 × 15 = 105/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
1/90 = 1 × 14/90 × 14 = 14/1260 - Add the two like fractions:
105/1260 + 14/1260 = 105 + 14/1260 = 119/1260 - 119/1260 simplified gives 17/180
- So, 7/84 + 1/90 = 17/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84+1/90 7/84+2/90 21/84+1/90 7/84+3/90 35/84+1/90 7/84+5/90 49/84+1/90 7/84+7/90