Add 12/18 and 90/40
1st number: 12/18, 2nd number: 2 10/40
12/18 + 90/40 is 35/12.
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,
12/18 = 12 × 20/18 × 20 = 240/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
90/40 = 90 × 9/40 × 9 = 810/360 - Add the two like fractions:
240/360 + 810/360 = 240 + 810/360 = 1050/360 - 1050/360 simplified gives 35/12
- So, 12/18 + 90/40 = 35/12
In mixed form: 211/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18+90/40 12/36+90/40 12/18+90/80 36/18+90/40 12/54+90/40 60/18+90/40 12/90+90/40 84/18+90/40