Add 12/8 and 84/20
1st number: 1 4/8, 2nd number: 4 4/20
12/8 + 84/20 is 57/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
12/8 = 12 × 5/8 × 5 = 60/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
84/20 = 84 × 2/20 × 2 = 168/40 - Add the two like fractions:
60/40 + 168/40 = 60 + 168/40 = 228/40 - 228/40 simplified gives 57/10
- So, 12/8 + 84/20 = 57/10
In mixed form: 57/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/8+84/20 12/16+84/20 12/8+84/40 36/8+84/20 12/24+84/20 12/8+84/60 60/8+84/20 12/40+84/20 84/8+84/20 12/56+84/20