Kong took 15, percent fewer seconds than Nolan took to complete his multiplication timed test. Kong took 85 seconds.

Question

asked Oct 26, 2018 154k views

2 Answers

Vijay Agrawal · Answer 1 · 2018-11-01T18:05:22+0000

Kong took 85 seconds to complete his multiplication timed test. Consider the proportion:

Nolan took x seconds - 100%

Kong took 85 seconds - 100%-15%=85%

That is mathematically

$(x)/(85)=(100)/(85),\\ \\x=(100\cdot 85)/(85)=100\ seconds.$

Answer: Nolan took 100 seconds to complete the test.