Answer:
200
Step-by-step explanation:
20 X 1000= 20000 divided by 100
let's say that number is "x", so that is then the 100%.
if 150 is 25%, what is "x"?

First, you want all the variables to be on one side:
a - 3b = 4
a - b = -2
Now you want to eliminate one of the variables, in this case a is easiest.
Subtract the second equation from the first and you're left with:
-2b = 6
so b = -3
Sub the value of b back into either of the equations and solve for x:
a - (-3) = -2
a = -5
So your answer is (-5,-3)
There are 54 muffins in the basket al you have to do is multiply the 60 by the added percentages which is .9 and you get the answer of 54