Add 21/45 and 2/4
21/45 + 2/4 is 29/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 4 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 4 × 45 = 180,
2/4 = 2 × 45/4 × 45 = 90/180 - Add the two like fractions:
84/180 + 90/180 = 84 + 90/180 = 174/180 - 174/180 simplified gives 29/30
- So, 21/45 + 2/4 = 29/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+2/4 21/90+2/4 21/45+2/8 63/45+2/4 21/45+6/4 21/45+2/12 21/45+10/4 21/45+2/20 21/45+14/4 21/45+2/28