you spend 90 minutes practicing flip tricks an slides on your skate board. The ratio of time spent on flip tricks to time spent on slides is 7:8. How much time do you spend practicing slides?

Answer 1

The first step is to find the total "units" of time that you have spent; since the ratio is 7:8, the total "units" are 7+8, or 15, totaling to 90 minutes. So,

15x=90

x=90/15

x=6,

which means that each "unit" is 6 minutes.

Since the ration was 7 flip tricks:8 slides, the amount of time spent on slides is 8x,

8x8*6=48 minutes spent on slides