Add 9/42 and 40/4, Solve 9/42 + 10 0/4 as a fraction

Add 9/42 and 40/4

1^st number: 9/42, 2^nd number: 10 0/4

9/42 + 40/4 is 143/14.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 42 × 2 = 84,
9/42 = 9 × 2/42 × 2 = 18/84
Likewise, for the 2nd fraction, since 4 × 21 = 84,
40/4 = 40 × 21/4 × 21 = 840/84
Add the two like fractions:
18/84 + 840/84 = 18 + 840/84 = 858/84
858/84 simplified gives 143/14
So, 9/42 + 40/4 = 143/14
In mixed form: 103/14

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad