Question
Mr Cheong's sports car was left with 15 fuel. He added 20 ℓ of fuel to his sports car, it became 715 full. How much more fuel was needed to fill up Mr Cheong's sports car?
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Mr Cheong's sports car was left with 15 fuel. He added 20 ℓ of fuel to his sports car, it became 715 full. How much more fuel was needed to fill up Mr Cheong's sports car?