Add 30/10 and 20/84
1st number: 3 0/10, 2nd number: 20/84
30/10 + 20/84 is 68/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 10 × 42 = 420,
30/10 = 30 × 42/10 × 42 = 1260/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
20/84 = 20 × 5/84 × 5 = 100/420 - Add the two like fractions:
1260/420 + 100/420 = 1260 + 100/420 = 1360/420 - 1360/420 simplified gives 68/21
- So, 30/10 + 20/84 = 68/21
In mixed form: 35/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/10+20/84 30/10+40/84 30/20+20/84 90/10+20/84 30/10+60/84 30/50+20/84 30/70+20/84