Question

two-fifths of a number is decreased by three.find the value of the expression if the number is twenty five

Answer 1

The expression would be written as:

$\frac{2}{5}$n-3

N is any number. This expression means two-fifths of a number, subtract three. Now substitute 25 for n.

$\frac{2}{5}$(25)-3
=10-3
=7