Add 21/60 and 3/30
21/60 + 3/30 is 9/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
3/30 = 3 × 2/30 × 2 = 6/60 - Add the two like fractions:
21/60 + 6/60 = 21 + 6/60 = 27/60 - 27/60 simplified gives 9/20
- So, 21/60 + 3/30 = 9/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60+3/30 21/60+6/30 21/60+3/60 63/60+3/30 21/60+9/30 21/60+3/90 21/60+15/30 21/60+21/30