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find 10% : 1.2

find 1% : 0.12

find 0.5% : 0.06

then multiply 1% by 8 : 0.96

And add 0.5% :

1.03

or a more accurate method as the previous method is only for approximation in mind.

This method is the real method used extensively.

85/1000*12

multiply 85*12=1020and then divide it by 1000

1020/1000=1.02

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14y ago

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