Question

find the principal amount :
interest rate = 4%
interest earned = $90
time = 10 years

Answer 1

Answer:

$225

Principal=S.I.*100/R*T

=90*100/4*10

=90*10/4(OR 45*5 if you reduce the above line by both 10 and 2)

=225

I hope this helps you

Answer 2

Answer:

Rate: 4%

SI : 90

Time: 10

P=90/4*10

p=$ 225

check: SI=P*R*T/100

= 225*4*10/100

=$90

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