Add 90/18 and 98/40
1st number: 5 0/18, 2nd number: 2 18/40
90/18 + 98/40 is 149/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
90/18 = 90 × 20/18 × 20 = 1800/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
98/40 = 98 × 9/40 × 9 = 882/360 - Add the two like fractions:
1800/360 + 882/360 = 1800 + 882/360 = 2682/360 - 2682/360 simplified gives 149/20
- So, 90/18 + 98/40 = 149/20
In mixed form: 79/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/36+98/40 90/18+98/80 90/54+98/40