Add 42/2 and 20/72
1st number: 21 0/2, 2nd number: 20/72
42/2 + 20/72 is 383/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 2 × 36 = 72,
42/2 = 42 × 36/2 × 36 = 1512/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
20/72 = 20 × 1/72 × 1 = 20/72 - Add the two like fractions:
1512/72 + 20/72 = 1512 + 20/72 = 1532/72 - 1532/72 simplified gives 383/18
- So, 42/2 + 20/72 = 383/18
In mixed form: 215/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2+20/72 42/2+40/72 42/4+20/72 42/2+60/72 42/6+20/72 42/10+20/72 42/14+20/72