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well first you need to find 10% of 40 which is 10 by dividing 40 by 4. so now divide 34 by 4 which is 8.5 so if you times this by 10 you get 100% because 10 x 10 is 100 so 100% is 85.. now you have to check this by getting a calculator by typing in 85 x 40 % and if it is 34 its right! hope this helps:-)

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14y ago

What else can I help you with?