This written statement can be converted into an equation.
What number can be "x" (unknown value being solved for).
is is the equal sign (=)
45% can be transferred to decimal form, "0.45"
of is the key word to multiply, so "times"
180 can remain 180.
We now have this equation:
x = 0.45 x 180
x = 81
81 is 45% of 180.