125% of what number is 20

16

Step-by-step explanation:

We can rewrite this as 125/100 · x = 20

This works because a percentage is out of 100, which means 125% is 125/100. "Of" usually means multiplied, and "what number" is the variable.

Now we can simplify this

125/100 · x = 20

5/4 · x = 20

x = 16

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.