Add 10/18 and 42/40
1st number: 10/18, 2nd number: 1 2/40
10/18 + 42/40 is 289/180.
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,
10/18 = 10 × 20/18 × 20 = 200/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
42/40 = 42 × 9/40 × 9 = 378/360 - Add the two like fractions:
200/360 + 378/360 = 200 + 378/360 = 578/360 - 578/360 simplified gives 289/180
- So, 10/18 + 42/40 = 289/180
In mixed form: 1109/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/18+42/40 10/18+84/40 10/36+42/40 10/18+42/80 30/18+42/40 10/54+42/40 50/18+42/40 10/90+42/40 70/18+42/40