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This is Before After question. 

1. Centre X.   30u. Total 100u.

    Centre Y. 30u – 45.  Total (30u – 45 ) × 2.5 = 75u – 112.5.

2. Transfer. 100u × 10% = 10u.

   Before    Transfer      after   
Centre X  100u – 10u 90u
Centre Y 75u – 112.5   + 10u 85u – 112.5

90u = 85u – 112.5 + 200

90u – 85u = 87.5

5u = 87.5

1u = 17.5

a)

85u = 17.5 × 85 = 1487.5

1487.5 – 112.5 = 1375 (After)

b)

1375 + 200 = 1575

1375/1575 × 100% = 87.30%

100% – 87.30% = 12.70%

😊

 

 

 

 

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 Total (30u – 45 ) × 2.5 = 75u – 112.5.

 

how u got 2.5?

 

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thank you

 

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