Add 10/40 and 42/9
1st number: 10/40, 2nd number: 4 6/9
10/40 + 42/9 is 59/12.
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,
10/40 = 10 × 9/40 × 9 = 90/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
42/9 = 42 × 40/9 × 40 = 1680/360 - Add the two like fractions:
90/360 + 1680/360 = 90 + 1680/360 = 1770/360 - 1770/360 simplified gives 59/12
- So, 10/40 + 42/9 = 59/12
In mixed form: 411/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40+42/9 10/40+84/9 10/80+42/9 10/40+42/18 30/40+42/9 10/40+42/27 50/40+42/9 10/40+42/45 70/40+42/9 10/40+42/63