There is 60minutes in an hour sooo using an online calculator 10% of 60minutes is 6minutes 10% because when you add up everything other than research you get 90%. 90% for everything other than research so 10% for research. They then want it in minutes and they let us know that she spent an hour on her iphone so as stated that's how it works
The 60$ system had a greater percentage decrease because it was a lower number to begin with. Taking the same portion out of two different numbers will always be a greater decrease for the lower number.
