1. Write the ratio in simplest form 45:15
A. 9:3 B. 3:1 C. 1:3 D. 4:1
Divide both numbers by 15.
To write a ratio in simplest form, we need to find the greatest common divisor (GCD) of the two numbers and divide both the numbers by the GCD.
In this case, the GCD of 45 and 15 is 15 (since 15 is a divisor of both numbers).
Dividing both 45 and 15 by 15, we get:
45 ÷ 15 = 3
15 ÷ 15 = 1
So, the ratio 45:15 simplifies to 3:1.
Therefore, the answer is B. 3:1.