Add 8/42 and 18/63
8/42 + 18/63 is 10/21.
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,
8/42 = 8 × 3/42 × 3 = 24/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
18/63 = 18 × 2/63 × 2 = 36/126 - Add the two like fractions:
24/126 + 36/126 = 24 + 36/126 = 60/126 - 60/126 simplified gives 10/21
- So, 8/42 + 18/63 = 10/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+18/63 8/42+36/63 8/84+18/63 24/42+18/63 8/42+54/63 40/42+18/63 8/42+90/63 56/42+18/63