You can
put this solution on YOUR website!Per cent means per one hundred. So, "something" per cent means
"something"/100. The problem says "What" percent. That sounds like

, the unknown. In other words,

is "what" per cent
Reading further, it asks "what per cent of 50" That's the same as

. And this is suppossed to equal 45.

is the equation. Solve for

So, 45 is 90% of 50