Percentages Without A Calculator

A Maths Starter of The Day

  420 720 2100 52740
10%        
50%        
25%        
331/3%        
75%        
90%        

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Answers
 

 

 420 720 2100 52740
10% 42 72 210 5274
50% 210 360 1050 26370
25% 105 180 525 13185
331/3% 140 240 700 17580
75% 315 540 1575 39555
90% 378 648 1890 47466

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