Add 30/4 and 72/80
1st number: 7 2/4, 2nd number: 72/80
30/4 + 72/80 is 42/5.
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,
72/80 = 72 × 1/80 × 1 = 72/80 - Add the two like fractions:
600/80 + 72/80 = 600 + 72/80 = 672/80 - 672/80 simplified gives 42/5
- So, 30/4 + 72/80 = 42/5
In mixed form: 82/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/4+72/80 30/8+72/80 90/4+72/80 30/12+72/80 30/20+72/80 30/28+72/80