Add 10/20 and 60/21
1st number: 10/20, 2nd number: 2 18/21
10/20 + 60/21 is 47/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
10/20 = 10 × 21/20 × 21 = 210/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
60/21 = 60 × 20/21 × 20 = 1200/420 - Add the two like fractions:
210/420 + 1200/420 = 210 + 1200/420 = 1410/420 - 1410/420 simplified gives 47/14
- So, 10/20 + 60/21 = 47/14
In mixed form: 35/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/40+60/21 10/20+60/42 30/20+60/21 10/60+60/21 10/20+60/63 50/20+60/21 70/20+60/21