Find a percent of a quantity as a rate per 100 (e.g., 30% of a quantity means 30/100 times the quantity); solve problems involving finding the whole given a part and the percent.
60ft/s -- 60s in a min, multiply by 60
3600ft/min -- 1 mile is 5280 feet, divide by 5280
Approximately 0.681818
This is decay because it has a minus symbol . Usually when the percent is decay is, it will have a minus sign, if the percent is growth it will have a + symbol.
I hope this helps you!
Im no genius or sure if its right, but I would definetly go with (12,4)