Add 3/20 and 75/21
1st number: 3/20, 2nd number: 3 12/21
3/20 + 75/21 is 521/140.
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,
3/20 = 3 × 21/20 × 21 = 63/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
75/21 = 75 × 20/21 × 20 = 1500/420 - Add the two like fractions:
63/420 + 1500/420 = 63 + 1500/420 = 1563/420 - 1563/420 simplified gives 521/140
- So, 3/20 + 75/21 = 521/140
In mixed form: 3101/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20+75/21 3/40+75/21 3/20+75/42 9/20+75/21 3/60+75/21 3/20+75/63 15/20+75/21 21/20+75/21