Add 30/4 and 42/80
1st number: 7 2/4, 2nd number: 42/80
30/4 + 42/80 is 321/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
30/4 = 30 × 20/4 × 20 = 600/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Add the two like fractions:
600/80 + 42/80 = 600 + 42/80 = 642/80 - 642/80 simplified gives 321/40
- So, 30/4 + 42/80 = 321/40
In mixed form: 81/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/4+42/80 30/4+84/80 30/8+42/80 90/4+42/80 30/12+42/80 30/20+42/80 30/28+42/80