Add 21/6 and 90/40
1st number: 3 3/6, 2nd number: 2 10/40
21/6 + 90/40 is 23/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 6 × 20 = 120,
21/6 = 21 × 20/6 × 20 = 420/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
90/40 = 90 × 3/40 × 3 = 270/120 - Add the two like fractions:
420/120 + 270/120 = 420 + 270/120 = 690/120 - 690/120 simplified gives 23/4
- So, 21/6 + 90/40 = 23/4
In mixed form: 53/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6+90/40 21/12+90/40 21/6+90/80 63/6+90/40 21/18+90/40 21/30+90/40 21/42+90/40