Numbers Flashcards
(6 cards)
1
Q
What’s the formula of compound interest
A
P * (1 + R/100) to the power of t
P is principal
T is time in years
R is compound interest rate in percent
2
Q
What’s the formula for simple interest
A
Final amount = initial principal balance(1 + annual interest rate times time)
The time is in years
A = P( 1+rt) remember , t is times in years
3
Q
Whats the percentage increase of 50 to 100
A
100 percent
4
Q
Add 7/9 to 5/6 and show calculations and answer is mixed numbers
A
First make both fractions into 18ths which gets 14/18 plus 15/18
Add them to get 29/18 then make Into mixed numbers 1 11/18
5
Q
How do you calculate percentage increase
A
Actual increase/ original value times 100
6
Q
How do you calculate percentage decrease
A
Actual decrease / original value times 100
