Add 21/45 and 3/60
21/45 + 3/60 is 31/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
21/45 = 21 × 4/45 × 4 = 84/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
3/60 = 3 × 3/60 × 3 = 9/180 - Add the two like fractions:
84/180 + 9/180 = 84 + 9/180 = 93/180 - 93/180 simplified gives 31/60
- So, 21/45 + 3/60 = 31/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+3/60 21/45+6/60 21/90+3/60 63/45+3/60 21/45+9/60 21/45+15/60 21/45+21/60