標題:
幾題maths
發問:
1. After May has 16% of the juice in a bottle,there is 315 ml of juice left.(a) What is the percentage of the volume of juice left?(b) What is the original volume of the juice?2.Welldone Supermarket is having a special offer on toothpaste for 'buy 4 toothpaster get 1 toothpaste... 顯示更多 1. After May has 16% of the juice in a bottle,there is 315 ml of juice left. (a) What is the percentage of the volume of juice left? (b) What is the original volume of the juice? 2.Welldone Supermarket is having a special offer on toothpaste for 'buy 4 toothpaster get 1 toothpaste free'.What is the percentage discount under this offer? Thank you!!
最佳解答:
1. After May has 16% of the juice in a bottle, there is 315 ml of juice left. (a) What is the percentage of the volume of juice left? The percentage of the volume of juice left is : 1 – 16% = 84% (b) What is the original volume of the juice? The original volume of the juice is : ( 315 / 84% ) ml = 375 ml 2. Welldone Supermarket is having a special offer on toothpaste for 'buy 4 toothpaste get 1 toothpaste free'. What is the percentage discount under this offer? Let the original price for a toothpaste be $x. The selling price after discount is : $(4x/5) The percentage discount under this offer is : [ ( x – 4x/5 ) / x ] x 100% = 1/5 x 100% = 20%
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