can u tell me the formula for calculating compound interest?

Question

principal=75000
interest @ 12%
period=28 months

Answer 1

To calculate the Amount,

A=P[1+(r/1000]^n

To calculate the interest,

CI=P[1+(r/100)]^n - P
or
CI=A-P

Where, P=principal, A=amount, CI=compound interest, n=time (in years), r=rate of interest

For P=75000, r=12%, n=28 months=2.33 years

Using the formula,
A=97,701.96
CI=22,701.96

Answer 2

The formula for Compound Interest is
CI = P[{1 + r/100}^n - 1]
= 75000 [{1 + 12/100}^28/12 - 1]
= 75000 [{112/100}^28/12 - 1]
= 75000 [1.303 - 1]
= 75000 * 0.303
= 22725

Therefore Compound Interest would be equal to Rs. 22725

Answer 3

A= P(1+R/100)^n
A = Amount
P=Principal
R= Rate
N= Time ( if months than N/12 )
Compound Interest = A-P

Answer 4

P(1 + r)n

Answer 5

P(1+R/100)^n

Answer 6

A = P(1+R/100)^N
I = A - P

Here calculation can be highly simplified if they are done on 7 month (taken as base)
where:
A =Amount
P=Principal = 75000
R=Rate of Interest = 12*7/12% per seven months = 7% per seven months
N=28/7 = 4 seven months
on substituting
A= 98,309.70
I = 23,309.70

Answer 7

p=75000 Rs
n=28 months = 7/3 years
r=12%
CI=p{(1+r/100)^(power)n)-p}

CI=7500{(1+12/100)^(power)7/3)-75000} Rs

Answer 8

p(1+r)n

Answer 9

the formula is
p(1+r/100)^n -p

p - principal
r- rate of interest
n - period in years

therefore in your sum

p=75000
r=12
n=28/12 (since we have to convert it in years)

Compound interest= (75000)*(1+12/100)^(28/12) - 75000
=97500-75000
= 22500

Answer 10

A= P(1+R/100)^n
a=amount
p-priciple
R-rate