What does that question even meAn
        
             
        
        
        
Answer:
Step-by-step explanation:
 
        
             
        
        
        
The equation for percentage increase is
{(New value - old value) / old value} x100%
Therefore it should be
{(22.5 - 19.5) / 19.5} x 100%
=15% (rounded to nearest whole number) 
Answer is B
        
                    
             
        
        
        
To solve this, we simply add up the total amount of money she spent that day:
21.50 + 10.58 + 5.88 + 7.51 + 2.95 = 48.42
50 - 48.42 = 1.58
She was $1.58 under the average.