Add 20/10 and 12/84
1st number: 2 0/10, 2nd number: 12/84
20/10 + 12/84 is 15/7.
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,
20/10 = 20 × 42/10 × 42 = 840/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
12/84 = 12 × 5/84 × 5 = 60/420 - Add the two like fractions:
840/420 + 60/420 = 840 + 60/420 = 900/420 - 900/420 simplified gives 15/7
- So, 20/10 + 12/84 = 15/7
In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/10+12/84 20/10+24/84 60/10+12/84 20/10+36/84 20/30+12/84 20/10+60/84 20/50+12/84 20/70+12/84