Question

if principal amount is $1800 and rate 5% and time is one year..how to find simple intrest ...plz do in maximum steps

Answer 1

SI=p×r×t/100
SI=1800×5×1/100
SI=18×5×1 (18 will come by cancelling zeros of 1800 and 100)
SI=18×5
SI =$90

Answer 2

Principal amount=$1800
Rate=5%
Time=1 year
therefore,
simple interest=p*r*t/100
                       =1800*5*1/100
                       =18*5
                       =$90
And if u want amount than
amount=S.I.+p
            =$90 + $1800
            =$1890