book Maths Puzzle Numerical Ability

The International Fisher Effect formula:
(S - S)/S X100 = i - i

(.7568 - .6667) = .0901/.6667 = .135143242 X 100 = 13.5143242

Here is where I'm having trouble.
13.5143242 =

Read Solution (Total 0)

book Other Question

10) The year y when sales were s million dollars for a particular electronics company can be modeled by the radical equation

y=1.3√s-4-7

w A rectangular garden has dimensions of 18 feet by 13 feet. A gravel path of equal width is to be built around the garden. How wide can the path be if there is enough gravel for 516 square feet?