Question

Formulas of -

law of exponent- Percentage, Simple
interest, Compound interest, Amount.
​

Answer 1

$i = \frac{ptr}{100}$

Answer 2

ANSWER (FORMULAS) :

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Percentage :

suppose , u got 50 marks out of 100

then you will find percentage

= 50/100 × 100

=50 %

(you have to multiply your marks upon total marks with 100.)

Simple interest :

suppose , principle ( p ) = 100

time ( n )= 2 years

rate ( r ) = 2 p.c.p.a (percent per anem)

interest = ?

therefore,

Interest( I )= P×N×R/100

=100 × 2 × 2 /100

(you have to divide principle × time × rate by 100).

Compound Interest / Amount :

again same if,

P = 100

N = 2

R = 2

I = ?

A = ?

then,

A = P ( 1 + R/100 ) raised to N

= 100 ( 1 + 2/100 ) raised to 2

= 100 ( 102/100) raise to 2

Amount = 10,404

then ,

Interest = Amount - principle

=10404 - 100

=10304

Interest = 10,304.

Here is your all formulas.

Hope it will help you. .........★★★

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