What is the ratio 16 to 40 written as a fraction in lowest terms?
1/4
8/20
2/5
3/8
The ratio 16 to 40 can be written as the fraction 16/40. To find the fraction in lowest terms, we can simplify it by dividing both the numerator and the denominator by their greatest common factor, which is 8.
So, 16/40 simplifies to 2/5.
Therefore, the answer is 2/5.