Add 42/15 and 54/8
1st number: 2 12/15, 2nd number: 6 6/8
42/15 + 54/8 is 191/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
42/15 = 42 × 8/15 × 8 = 336/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
54/8 = 54 × 15/8 × 15 = 810/120 - Add the two like fractions:
336/120 + 810/120 = 336 + 810/120 = 1146/120 - 1146/120 simplified gives 191/20
- So, 42/15 + 54/8 = 191/20
In mixed form: 911/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15+54/8 42/30+54/8 42/15+54/16 42/45+54/8 42/15+54/24 42/75+54/8 42/15+54/40 42/15+54/56