Add 42/60 and 12/9
1st number: 42/60, 2nd number: 1 3/9
42/60 + 12/9 is 61/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
42/60 = 42 × 3/60 × 3 = 126/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
12/9 = 12 × 20/9 × 20 = 240/180 - Add the two like fractions:
126/180 + 240/180 = 126 + 240/180 = 366/180 - 366/180 simplified gives 61/30
- So, 42/60 + 12/9 = 61/30
In mixed form: 21/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/60+12/9 42/60+24/9 42/60+12/18 42/60+36/9 42/60+12/27 42/60+60/9 42/60+12/45 42/60+84/9 42/60+12/63