Answer: 409.23
Step-by-step explanation: Step 1: If 65% of a number is 266, then what is 100% of that number? Setup the equation. 
 
266 
65% = Y 
100% 
 
Step 2: Solve for Y 
Using cross multiplication of two fractions, we get 
65Y = 266 x 100 
65Y = 26600 
Y = 26600 
100 = 409.23