Question

worked examples
try using models to find a whole
practice with percents
asher decides to solve this problem by using double number lines.
15 is 60% of what number?
he begins by drawing a number line with tick marks labeled in increments of 20%.
he draws his second number line with the same number of parts.
how should asher label the tick marks on his second number line?
enter your answers in the boxes.
0% 20% 40% 60% 80% 100%
0 □ □ 15 □ □

Explanation:

Step1: Find 20% value

Since 60% = 15, divide by 3:
$\frac{15}{3}=5$

Step2: Calculate 40% value

Multiply 20% value by 2:
$5\times2=10$

Step3: Calculate 80% value

Multiply 20% value by 4:
$5\times4=20$

Step4: Calculate 100% value

Multiply 20% value by 5:
$5\times5=25$

Answer:

From left to right, the missing values are 5, 10, 20, 25