Add 10/21 and 15/60
10/21 + 15/60 is 61/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
10/21 = 10 × 20/21 × 20 = 200/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
15/60 = 15 × 7/60 × 7 = 105/420 - Add the two like fractions:
200/420 + 105/420 = 200 + 105/420 = 305/420 - 305/420 simplified gives 61/84
- So, 10/21 + 15/60 = 61/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21+15/60 10/21+30/60 10/42+15/60 30/21+15/60 10/21+45/60 10/63+15/60 50/21+15/60 10/21+75/60 70/21+15/60