Add 21/10 and 18/4
1st number: 2 1/10, 2nd number: 4 2/4
21/10 + 18/4 is 33/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
21/10 = 21 × 2/10 × 2 = 42/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
18/4 = 18 × 5/4 × 5 = 90/20 - Add the two like fractions:
42/20 + 90/20 = 42 + 90/20 = 132/20 - 132/20 simplified gives 33/5
- So, 21/10 + 18/4 = 33/5
In mixed form: 63/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10+18/4 21/10+36/4 21/20+18/4 21/10+18/8 63/10+18/4 21/10+54/4 21/30+18/4 21/10+18/12 21/10+90/4 21/50+18/4 21/10+18/20 21/70+18/4 21/10+18/28