Add 90/36 and 30/40
1st number: 2 18/36, 2nd number: 30/40
90/36 + 30/40 is 13/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 36 × 10 = 360,
90/36 = 90 × 10/36 × 10 = 900/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
30/40 = 30 × 9/40 × 9 = 270/360 - Add the two like fractions:
900/360 + 270/360 = 900 + 270/360 = 1170/360 - 1170/360 simplified gives 13/4
- So, 90/36 + 30/40 = 13/4
In mixed form: 31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/36+60/40 90/72+30/40 90/36+30/80 90/36+90/40