Add 24/20 and 42/21
1st number: 1 4/20, 2nd number: 2 0/21
24/20 + 42/21 is 16/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
24/20 = 24 × 21/20 × 21 = 504/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
42/21 = 42 × 20/21 × 20 = 840/420 - Add the two like fractions:
504/420 + 840/420 = 504 + 840/420 = 1344/420 - 1344/420 simplified gives 16/5
- So, 24/20 + 42/21 = 16/5
In mixed form: 31/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/20+42/21 24/20+84/21 24/40+42/21 72/20+42/21 24/60+42/21 24/20+42/63