Solving Addition Equations  
Common Core Math Alignment: 6.EE.7. Solve realworld and mathematical problems by writing and solving equations of the form x + p = q and px = q for cases in which p, q and x are all nonnegative rational numbers.
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50% (375 x 250) 
75% (563 x 375) 
100% (750 x 500) 
150% (1125 x 750) 
200% (1500 x 1000) 
300% (2250 x 1500) 