reinout-g: erawls: 50% of 90
90 * 50/100 = 45
Thanks reinout-g
This is exactly the same but it might be easier to follow.
50% of 90
now the % means over 100 and of means x
so just do exactly what the question says
50/100 x 90 =
In computer speak we often use a * instead of a x sign.
That way it is not confusing if there are x es in the questions
+118673 
