Add 90/36 and 70/80
1st number: 2 18/36, 2nd number: 70/80
90/36 + 70/80 is 27/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 36 × 20 = 720,
90/36 = 90 × 20/36 × 20 = 1800/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
70/80 = 70 × 9/80 × 9 = 630/720 - Add the two like fractions:
1800/720 + 630/720 = 1800 + 630/720 = 2430/720 - 2430/720 simplified gives 27/8
- So, 90/36 + 70/80 = 27/8
In mixed form: 33/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+70/80