A number is to be multiplied by the fraction 4/5.But amit, by mistake multiplied it by 5/4 and obtained the number 81 more than the correct value.what was the original number?	Choose the correct choice from the following
A) 200	B) 240	C) 180	D) 120	E) 100
let the no. be x.   x*5/4 - x*4/5 =81. solving this we get 180   ANSWER:180
<result>C</result>
A number is to be multiplied by the fraction 4/5.But amit, by mistake multiplied it by 5/4 and obtained the number 81 more than the correct value.what was the original number?