Add 5/80 and 20/42
5/80 + 20/42 is 181/336.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
5/80 = 5 × 21/80 × 21 = 105/1680 - Likewise, for the 2nd fraction, since 42 × 40 = 1680,
20/42 = 20 × 40/42 × 40 = 800/1680 - Add the two like fractions:
105/1680 + 800/1680 = 105 + 800/1680 = 905/1680 - 905/1680 simplified gives 181/336
- So, 5/80 + 20/42 = 181/336
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/80+20/42 5/80+40/42 5/80+20/84 15/80+20/42 5/80+60/42 25/80+20/42 35/80+20/42