Add 42/20 and 40/15
1st number: 2 2/20, 2nd number: 2 10/15
42/20 + 40/15 is 143/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
40/15 = 40 × 4/15 × 4 = 160/60 - Add the two like fractions:
126/60 + 160/60 = 126 + 160/60 = 286/60 - 286/60 simplified gives 143/30
- So, 42/20 + 40/15 = 143/30
In mixed form: 423/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+40/15 42/20+80/15 42/40+40/15 42/20+40/30 42/60+40/15 42/20+40/45 42/20+40/75