Add 20/80 and 40/30
1st number: 20/80, 2nd number: 1 10/30
20/80 + 40/30 is 19/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
20/80 = 20 × 3/80 × 3 = 60/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
40/30 = 40 × 8/30 × 8 = 320/240 - Add the two like fractions:
60/240 + 320/240 = 60 + 320/240 = 380/240 - 380/240 simplified gives 19/12
- So, 20/80 + 40/30 = 19/12
In mixed form: 17/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/80+40/30 20/80+80/30 20/80+40/60 60/80+40/30 20/80+40/90