Add 30/35 and 80/40
1st number: 30/35, 2nd number: 2 0/40
30/35 + 80/40 is 20/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 35 × 8 = 280,
30/35 = 30 × 8/35 × 8 = 240/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
80/40 = 80 × 7/40 × 7 = 560/280 - Add the two like fractions:
240/280 + 560/280 = 240 + 560/280 = 800/280 - 800/280 simplified gives 20/7
- So, 30/35 + 80/40 = 20/7
In mixed form: 26/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/35+80/40 30/70+80/40 90/35+80/40