Add 20/12 and 72/80
1st number: 1 8/12, 2nd number: 72/80
20/12 + 72/80 is 77/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 12 × 20 = 240,
20/12 = 20 × 20/12 × 20 = 400/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
72/80 = 72 × 3/80 × 3 = 216/240 - Add the two like fractions:
400/240 + 216/240 = 400 + 216/240 = 616/240 - 616/240 simplified gives 77/30
- So, 20/12 + 72/80 = 77/30
In mixed form: 217/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/12+72/80 20/24+72/80 60/12+72/80 20/36+72/80 20/60+72/80 20/84+72/80