Mark played video games for 1 hour. the circle graph shows the different types of video games he played. based on the graph, about how many minutes did mark play the racing game?

The complete question in the attached figure

observing the graph we can say that the racing game is approximately 25% of the total
so
if 1 hour is ----------------------> 100%
  X-----------------------------25%
x=25/100------> 1/4=0.25 hours
convert to minutes
0.25*60---------> 15 minutes

the answer is 15 minutes

71.4% because you would take the 25 and divide it by 35