Add 40/20 and 90/18
1st number: 2 0/20, 2nd number: 5 0/18
40/20 + 90/18 is 7/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
40/20 = 40 × 9/20 × 9 = 360/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
90/18 = 90 × 10/18 × 10 = 900/180 - Add the two like fractions:
360/180 + 900/180 = 360 + 900/180 = 1260/180 - 1260/180 simplified gives 7/1
- So, 40/20 + 90/18 = 7/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20+90/18 40/20+90/36 40/60+90/18 40/20+90/54