Question

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

Answer 1

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

Answer 2

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