Add 21/30 and 40/36
1st number: 21/30, 2nd number: 1 4/36
21/30 + 40/36 is 163/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 30 × 6 = 180,
21/30 = 21 × 6/30 × 6 = 126/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
40/36 = 40 × 5/36 × 5 = 200/180 - Add the two like fractions:
126/180 + 200/180 = 126 + 200/180 = 326/180 - 326/180 simplified gives 163/90
- So, 21/30 + 40/36 = 163/90
In mixed form: 173/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+40/36 21/30+80/36 21/60+40/36 21/30+40/72 63/30+40/36 21/90+40/36