1
Q
Amount of SI
A
P(1+RT/100)
2
Q
CI
A
P[(1-R/100)^n-1]
3
Q
Amount of CI
A
P[1+R/100]^n
4
Q
ROI differ from year to year
R1R2R3….3 years
Amount=?
A
A= P[1+R1/100][1+R2/100][1+R3/100]
5
Q
ROI differ every year
Amount=?
A
A= P[1+R/100]^n
6
Q
P changes every 6 months or compounded half yearly or semi annually
A
A= P[1+(R/2)/100]^2n
7
Q
Interest compounded annually but time it is in
A
A= P(1+R/100)^2 [1+fr^R/100]
8
Q
Difference between SI and CI for 2 years or terms
A
D= P(R/100)^2
9
Q
Present worth
A
x/ (1+r/100)^n
10
Q
True discount
A
SD- PW
Or
Amount-PW
11
Q
PW
A
100(R*T)
Or
100TD/RT
12
Q
A
A
Pe^n
