Add 90/27 and 90/40
1st number: 3 9/27, 2nd number: 2 10/40
90/27 + 90/40 is 67/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 40 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 27 × 40 = 1080,
90/27 = 90 × 40/27 × 40 = 3600/1080 - Likewise, for the 2nd fraction, since 40 × 27 = 1080,
90/40 = 90 × 27/40 × 27 = 2430/1080 - Add the two like fractions:
3600/1080 + 2430/1080 = 3600 + 2430/1080 = 6030/1080 - 6030/1080 simplified gives 67/12
- So, 90/27 + 90/40 = 67/12
In mixed form: 57/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/54+90/40 90/27+90/80 90/81+90/40