Add 10/54 and 20/42
10/54 + 20/42 is 125/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
10/54 = 10 × 7/54 × 7 = 70/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
20/42 = 20 × 9/42 × 9 = 180/378 - Add the two like fractions:
70/378 + 180/378 = 70 + 180/378 = 250/378 - 250/378 simplified gives 125/189
- So, 10/54 + 20/42 = 125/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/54+20/42 10/54+40/42 10/54+20/84 30/54+20/42 10/54+60/42 50/54+20/42 70/54+20/42