Add 30/40 and 42/9
1st number: 30/40, 2nd number: 4 6/9
30/40 + 42/9 is 65/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
30/40 = 30 × 9/40 × 9 = 270/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
42/9 = 42 × 40/9 × 40 = 1680/360 - Add the two like fractions:
270/360 + 1680/360 = 270 + 1680/360 = 1950/360 - 1950/360 simplified gives 65/12
- So, 30/40 + 42/9 = 65/12
In mixed form: 55/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+42/9 30/40+84/9 30/80+42/9 30/40+42/18 90/40+42/9 30/40+42/27 30/40+42/45 30/40+42/63