Question

make a diagram to show the number of students and adults.
field trip\ttotal
students\tpink bar\t20
adults\tblue bar\t4
enter the ratio of students to adults.
20 students : 4 adults
enter the ratio of adults to students.
blank adults : ? students

Explanation:

For the ratio of adults to students:

Step1: Identify the number of adults and students

Number of adults = 4, Number of students = 20.

Step2: Form the ratio of adults to students

The ratio of adults to students is the number of adults divided by the number of students, so it is \( 4:20 \). We can simplify this ratio by dividing both numbers by their greatest common divisor, which is 4. \( \frac{4}{4}:\frac{20}{4}=1:5 \), but the question just asks for the ratio using the given numbers (or simplified, but since the first ratio was 20:4, for adults to students it's 4:20, or simplified 1:5, but looking at the format, we use the numbers as given or simplified. Wait, the first ratio was 20 students : 4 adults, so for adults to students, it's 4 adults : 20 students, which can be simplified by dividing both by 4 to get 1:5, but let's check the numbers. The number of adults is 4, students is 20. So the ratio of adults to students is 4:20, or simplifying, divide numerator and denominator by 4: \( \frac{4}{4}:\frac{20}{4}=1:5 \). But the box is for the first number (adults), so we can put 4 (or 1 if simplified, but let's see the first ratio was 20:4, so for adults to students, it's 4:20, so the first blank is 4, and the second is 20, or simplified 1 and 5. But let's do it step by step.

Answer:

For the ratio of adults to students, the ratio is \( 4 \) adults : \( 20 \) students (or simplified \( 1 \) adults : \( 5 \) students). If we use the original numbers, the first blank is \( 4 \), the second is \( 20 \). If simplified, first is \( 1 \), second is \( 5 \). But since the first ratio was 20:4 (not simplified), so the ratio of adults to students is 4:20, so the answer for the blank (the number of adults) is \( 4 \) (and students is \( 20 \)).