Add 21/2 and 20/60
1st number: 10 1/2, 2nd number: 20/60
21/2 + 20/60 is 65/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 2 × 30 = 60,
21/2 = 21 × 30/2 × 30 = 630/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
20/60 = 20 × 1/60 × 1 = 20/60 - Add the two like fractions:
630/60 + 20/60 = 630 + 20/60 = 650/60 - 650/60 simplified gives 65/6
- So, 21/2 + 20/60 = 65/6
In mixed form: 105/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+20/60 21/2+40/60 21/4+20/60 63/2+20/60 21/6+20/60 21/10+20/60 21/14+20/60