2000000:30000

To simplify the ratio 2000000:30000, you can divide both numbers by their greatest common divisor (GCD).

In this case, both numbers can be divided by 10000:

\[ \frac{2000000 \div 10000}{30000 \div 10000} = \frac{200}{3} \]

So, the simplified ratio of 2000000:30000 is 200:3.