Answer:
300 times more.
Step-by-step explanation:
An adult blinks about in 30 minutes = 450 times
An adult blinks in one minute = [tex]\frac{450}{30}[/tex]
= 15 times
In 60 minutes an adult blinks = 60 × 15 = 900 times
A 12 year old blinks about in 15 minutes = 150 times
A 12 year old blinks in one minute = [tex]\frac{150}{15}[/tex]
= 10 times
In 60 minutes a 12 year old blinks = 60 × 10 = 600 times
The difference between the number of blinks in 60 minutes = 900 - 600
= 300 times
In 60 minutes an adult blink 300 times more than a 12 year old.