Add 12/80 and 28/84
12/80 + 28/84 is 29/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 84 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
12/80 = 12 × 21/80 × 21 = 252/1680 - Likewise, for the 2nd fraction, since 84 × 20 = 1680,
28/84 = 28 × 20/84 × 20 = 560/1680 - Add the two like fractions:
252/1680 + 560/1680 = 252 + 560/1680 = 812/1680 - 812/1680 simplified gives 29/60
- So, 12/80 + 28/84 = 29/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/80+28/84 12/80+56/84 36/80+28/84 60/80+28/84 84/80+28/84