Add 30/42 and 40/10
1st number: 30/42, 2nd number: 4 0/10
30/42 + 40/10 is 33/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
30/42 = 30 × 5/42 × 5 = 150/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
40/10 = 40 × 21/10 × 21 = 840/210 - Add the two like fractions:
150/210 + 840/210 = 150 + 840/210 = 990/210 - 990/210 simplified gives 33/7
- So, 30/42 + 40/10 = 33/7
In mixed form: 45/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42+40/10 30/42+80/10 30/84+40/10 30/42+40/20 90/42+40/10 30/42+40/30 30/42+40/50 30/42+40/70