Add 42/7 and 54/40
1st number: 6 0/7, 2nd number: 1 14/40
42/7 + 54/40 is 147/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
42/7 = 42 × 40/7 × 40 = 1680/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
54/40 = 54 × 7/40 × 7 = 378/280 - Add the two like fractions:
1680/280 + 378/280 = 1680 + 378/280 = 2058/280 - 2058/280 simplified gives 147/20
- So, 42/7 + 54/40 = 147/20
In mixed form: 77/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/7+54/40 42/14+54/40 42/7+54/80 42/21+54/40 42/35+54/40 42/49+54/40