Add 9/45 and 60/42, Solve 9/45 + 1 18/42 as a fraction

Add 9/45 and 60/42

1^st number: 9/45, 2^nd number: 1 18/42

9/45 + 60/42 is 57/35.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 45 × 14 = 630,
9/45 = 9 × 14/45 × 14 = 126/630
Likewise, for the 2nd fraction, since 42 × 15 = 630,
60/42 = 60 × 15/42 × 15 = 900/630
Add the two like fractions:
126/630 + 900/630 = 126 + 900/630 = 1026/630
1026/630 simplified gives 57/35
So, 9/45 + 60/42 = 57/35
In mixed form: 122/35

MathStep (Works offline)

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