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This is a Part whole question.

LCM 

15/100 = 3/20

   Morning   Afternoon  Left   Total 
R1  885 5u 3u 885 + 8u
         

3u/3  = (885 + 8u)/20

20u = 885 + 8u

20u – 8u = 885

12u = 885

4u = 885 ÷ 3 = 295

8u = 295 × 2 = 590

590 + 885 = 1475

 

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