Add 3/42 and 10/80
3/42 + 10/80 is 11/56.
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,
3/42 = 3 × 40/42 × 40 = 120/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
10/80 = 10 × 21/80 × 21 = 210/1680 - Add the two like fractions:
120/1680 + 210/1680 = 120 + 210/1680 = 330/1680 - 330/1680 simplified gives 11/56
- So, 3/42 + 10/80 = 11/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+10/80 3/42+20/80 3/84+10/80 9/42+10/80 3/42+30/80 15/42+10/80 3/42+50/80 21/42+10/80 3/42+70/80