Add 21/45 and 40/36
1st number: 21/45, 2nd number: 1 4/36
21/45 + 40/36 is 71/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 36 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 36 × 5 = 180,
40/36 = 40 × 5/36 × 5 = 200/180 - Add the two like fractions:
84/180 + 200/180 = 84 + 200/180 = 284/180 - 284/180 simplified gives 71/45
- So, 21/45 + 40/36 = 71/45
In mixed form: 126/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+40/36 21/45+80/36 21/90+40/36 21/45+40/72 63/45+40/36