Add 42/9 and 30/40
1st number: 4 6/9, 2nd number: 30/40
42/9 + 30/40 is 65/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 9 × 40 = 360,
42/9 = 42 × 40/9 × 40 = 1680/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
30/40 = 30 × 9/40 × 9 = 270/360 - Add the two like fractions:
1680/360 + 270/360 = 1680 + 270/360 = 1950/360 - 1950/360 simplified gives 65/12
- So, 42/9 + 30/40 = 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: 84/9+30/40 42/9+60/40 42/18+30/40 42/9+30/80 42/9+90/40 42/27+30/40 42/45+30/40 42/63+30/40