Add 40/18 and 98/20
1st number: 2 4/18, 2nd number: 4 18/20
40/18 + 98/20 is 641/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
40/18 = 40 × 10/18 × 10 = 400/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
98/20 = 98 × 9/20 × 9 = 882/180 - Add the two like fractions:
400/180 + 882/180 = 400 + 882/180 = 1282/180 - 1282/180 simplified gives 641/90
- So, 40/18 + 98/20 = 641/90
In mixed form: 711/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18+98/20 40/36+98/20 40/18+98/40 40/54+98/20 40/18+98/60 40/90+98/20