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Answer

13. 

1 minute = 60 seconds

3 minutes = 3 * 60 = 180 seconds

20% of 3 min = 180 * 20% =  180 * 20/100 = 36 seconds.

14.

0.2% = 0.2 /100 = 2/1000 = 1/500

Note: when convert any % into fraction, just divide by 100. 

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