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  • Cheng Leong

ThinkTank #9 - Maths


The key to unlock this question is to recognise that 45% of Paul’s remaining money is equal to 30% of what Paul had at the beginning.


Through the use of percentages and ratio, we are able to see that Paul had 2/3 of his money left, which meant that he spent 1/3 of his money on the dinner.


Solving for ($60 x 3) would give us $180, the original amount of money Paul had in the beginning.

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