Add 1/20 and 16/21
1/20 + 16/21 is 341/420.
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,
1/20 = 1 × 21/20 × 21 = 21/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
16/21 = 16 × 20/21 × 20 = 320/420 - Add the two like fractions:
21/420 + 320/420 = 21 + 320/420 = 341/420 - So, 1/20 + 16/21 = 341/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/20+16/21 1/20+32/21 1/40+16/21 1/20+16/42 3/20+16/21 1/20+48/21 1/60+16/21 1/20+16/63 5/20+16/21 1/20+80/21 7/20+16/21