Add 24/42 and 28/80
24/42 + 28/80 is 129/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
24/42 = 24 × 40/42 × 40 = 960/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
28/80 = 28 × 21/80 × 21 = 588/1680 - Add the two like fractions:
960/1680 + 588/1680 = 960 + 588/1680 = 1548/1680 - 1548/1680 simplified gives 129/140
- So, 24/42 + 28/80 = 129/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/42+28/80 24/42+56/80 24/84+28/80 72/42+28/80 24/42+84/80