Coins Mystery  
Common Core Math Alignment: 5.MD.1. Convert among differentsized standard measurement units within a given measurement system (e.g., convert 5 cm to 0.05 m), and use these conversions in solving multistep, real world problems.
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50% (275 x 250) 
75% (413 x 375) 
100% (550 x 500) 
150% (825 x 750) 
200% (1100 x 1000) 
300% (1650 x 1500) 