Add 16/21 and 42/20
1st number: 16/21, 2nd number: 2 2/20
16/21 + 42/20 is 601/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
16/21 = 16 × 20/21 × 20 = 320/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
42/20 = 42 × 21/20 × 21 = 882/420 - Add the two like fractions:
320/420 + 882/420 = 320 + 882/420 = 1202/420 - 1202/420 simplified gives 601/210
- So, 16/21 + 42/20 = 601/210
In mixed form: 2181/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21+42/20 16/21+84/20 16/42+42/20 16/21+42/40 48/21+42/20 16/63+42/20 16/21+42/60 80/21+42/20