Add 21/60 and 12/20
21/60 + 12/20 is 19/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 20 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 20 × 3 = 60,
12/20 = 12 × 3/20 × 3 = 36/60 - Add the two like fractions:
21/60 + 36/60 = 21 + 36/60 = 57/60 - 57/60 simplified gives 19/20
- So, 21/60 + 12/20 = 19/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60+12/20 21/60+24/20 21/60+12/40 63/60+12/20 21/60+36/20 21/60+12/60 21/60+60/20 21/60+84/20