Add 12/80 and 42/60
12/80 + 42/60 is 17/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 60 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
12/80 = 12 × 3/80 × 3 = 36/240 - Likewise, for the 2nd fraction, since 60 × 4 = 240,
42/60 = 42 × 4/60 × 4 = 168/240 - Add the two like fractions:
36/240 + 168/240 = 36 + 168/240 = 204/240 - 204/240 simplified gives 17/20
- So, 12/80 + 42/60 = 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/80+42/60 12/80+84/60 36/80+42/60 60/80+42/60 84/80+42/60