Add 21/18 and 40/10
1st number: 1 3/18, 2nd number: 4 0/10
21/18 + 40/10 is 31/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
40/10 = 40 × 9/10 × 9 = 360/90 - Add the two like fractions:
105/90 + 360/90 = 105 + 360/90 = 465/90 - 465/90 simplified gives 31/6
- So, 21/18 + 40/10 = 31/6
In mixed form: 51/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18+40/10 21/18+80/10 21/36+40/10 21/18+40/20 63/18+40/10 21/54+40/10 21/18+40/30 21/90+40/10 21/18+40/50 21/18+40/70