Kong took 15% percent fewer seconds than Nolan took to complete his multiplication timed test. Kong took 85 seconds. How many seconds did Nolan take?

Kong took 15% fewer seconds than Nolan took. So Kong took 100%−15%=85% 85/.85=.85*?/.85100=?Which means that Nolan took 100 seconds.This is all from Khan Academy so it's correct!!Hope this helps!!