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## Question

primary 6 | Maths
| Percentage

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150 → 100%

10% → 150 ÷ 10 = 15

60% → 15 x 6 = 90

(Or 60% = 150 x 60/100 = 90)

So there are 90 chairs.

Notice that number of chairs did not change since only tables were added.

Percentage of chairs after addition of more tables= 100% - 64% = 36%

36% = 90

100% = 90 x 100/36 = 250

(Or 1% = 90 ÷ 36 = 2.5

100% = 2.5 x 100 = 250)

So there are 250 chairs and tables now.

Number of tables added

= 250 - 150

= 100

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