Add 36/42 and 24/80
36/42 + 24/80 is 81/70.
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,
36/42 = 36 × 40/42 × 40 = 1440/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
24/80 = 24 × 21/80 × 21 = 504/1680 - Add the two like fractions:
1440/1680 + 504/1680 = 1440 + 504/1680 = 1944/1680 - 1944/1680 simplified gives 81/70
- So, 36/42 + 24/80 = 81/70
In mixed form: 111/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+24/80 36/42+48/80 36/84+24/80 36/42+72/80