George found that he blinked 85 times in 15 minutes at this rate how many minutes pass during 51 blinks math

Since they blink at the same rate, the number of blinks per minute must be equal between the two periods of time. Therefore,

85 blinks / 15 minutes = x blinks per minute

51 blinks / y minutes = x blinks per minute

Since the rates are equal, you can set these two proportions equal to each other.

85 blinks / 15 minutes = 51 blinks / y minutes

85 * y = 51 * 15

y = (51 * 15) / 85 = 9 minutes

So 85 is to 15 mins

85:15

85/15=17/3

17:3=51:x

17/3=51/x

multiply both sides by 3x to clear fraction

17x=153

divide both sides by 17

x=9

9 mins passed