Add 10/42 and 40/63
10/42 + 40/63 is 55/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
10/42 = 10 × 3/42 × 3 = 30/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
40/63 = 40 × 2/63 × 2 = 80/126 - Add the two like fractions:
30/126 + 80/126 = 30 + 80/126 = 110/126 - 110/126 simplified gives 55/63
- So, 10/42 + 40/63 = 55/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42+40/63 10/42+80/63 10/84+40/63 30/42+40/63 50/42+40/63 70/42+40/63