Answer:24%
Explanation:
Step 1: We make the assumption that 50 is 100% since it is our output value. 
Step 2: We next represent the value we seek with x
 Step 3: From step 1, it follows that 100\%=50.
Step 4: In the same vein, x\%=12.
 Step 5: This gives us a pair of simple equations:
hope this helps