Add 80/42 and 63/8
1st number: 1 38/42, 2nd number: 7 7/8
80/42 + 63/8 is 1643/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
80/42 = 80 × 4/42 × 4 = 320/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
63/8 = 63 × 21/8 × 21 = 1323/168 - Add the two like fractions:
320/168 + 1323/168 = 320 + 1323/168 = 1643/168 - So, 80/42 + 63/8 = 1643/168
In mixed form: 9131/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/84+63/8 80/42+63/16 80/42+63/24 80/42+63/40 80/42+63/56