Over the course of 3 track practices, David ran a total of 15.75 miles. How many miles will David have run after 15 track practices?

Question

Quizplus · Accepted Answer

This is a ratio/proportion problem. We have 15.75 miles for 3 track practices. So, how many miles will he run in 15 track practices? We can write that as a proportion:
15.75: 3 :: x: 15
Step 1: Rewrite the proportion as a fraction.
 11ec0fda_98dc_d872_a67f_65ed1760c0f7_NR0004_00 Step 2: Cross multiply.
 11ec0fda_98dc_d873_a67f_a9a713592690_NR0004_00 Step 3: Simplify the right side of the equation. 15.75 x 15 = 236.25
 11ec0fda_98dc_d874_a67f_0961f14cc45a_NR0004_00 Step 4: Simplify by dividing both sides of the equation by 3.
 11ec0fda_98dc_d875_a67f_2f8b02274657_NR0004_00

Over the Course of 3 Track Practices, David Ran a Total