Percentage Calculator
Solve three common percentage problems: what is X% of Y, X is what % of Y, and what is the percentage change.
Problem Type 1: What is X% of Y?
            
            % of
            
            is
            30
            
        
        
        Problem Type 2: X is what % of Y?
            
            is what % of
            
            ?
            12.5%
            
        
        Problem Type 3: Percentage Change
            From
            
            to
            
            is a
            20% Increase