Answer:
Ratio defined as the comparison between two sizes or number.
i.,e a to b = a: b or
![(a)/(b)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/3ieqiim7n24kz6w1yrgbi037zxpcc432h0.png)
As per the statement:
comparing the first quantity to the second quantity a zoo has 19 monkeys and 10 chimpanzees.
First quantity = 19 monkeys
Second quantity = 10 chimpanzees.
then by definition of ratio:
![\frac{\text{Moneky}}{\text{Chimpanzees}} = (19)/(10)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/srcafxuo7owitk0vsnidaua7lg3axld7fd.png)
We have to find the ratio for the situation in three ways.
Ratios for the situation in three ways;
19 to 10
![(19)/(10)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/mzc1fgh4t6aouli1cfxb3qv0236sfub1y7.png)
19:10