Add 90/45 and 36/20
1st number: 2 0/45, 2nd number: 1 16/20
90/45 + 36/20 is 19/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
90/45 = 90 × 4/45 × 4 = 360/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
36/20 = 36 × 9/20 × 9 = 324/180 - Add the two like fractions:
360/180 + 324/180 = 360 + 324/180 = 684/180 - 684/180 simplified gives 19/5
- So, 90/45 + 36/20 = 19/5
In mixed form: 34/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/45+72/20 90/45+36/40 90/45+36/60