A bottle of soft drink contains 750ml of drink. If per sip 20ml of drink is taken out, Find the percentage decrease in the quantity of the drink after 23 such sips.

A percentage is a number or ratio that can be expressed as a fraction of 100. To find the percentage of a number, divide the number by the whole and multiply by 100.  Here are some tips for solving percentage aptitude questions: Converting fractions to percentages: Multiply the fraction by 100. For example, 0.5 = 0.5 x 100 = 50%. Converting percentages to fractions: Divide the percentage by 100. For example, 60% = 40/100 = 0.6. Percentage increase or decrease: Use the formula % increase /decrease = 100 × Quantity increase or decrease / original quantity. For example, if a salary increases... Show more

A percentage is a number or ratio that can be expressed as a fraction of 100. To find the percentage of a number, divide the number by the whole and multiply by 100. 

Here are some tips for solving percentage aptitude questions:
Converting fractions to percentages: Multiply the fraction by 100. For example, 0.5 = 0.5 x 100 = 50%.
Converting percentages to fractions: Divide the percentage by 100. For example, 60% = 40/100 = 0.6.
Percentage increase or decrease: Use the formula % increase /decrease = 100 × Quantity increase or decrease / original quantity. For example, if a salary increases from Rs 100 to Rs 135, the percentage increase is 35%.
To find what percentage of x is y: y/x × 100.
To calculate percentage change in value: Percentage change = {change/(initial value)} x 100.
Percentage point change: Difference of two percentage figures.
Increase N by S %: N( 1+ S/100 ).
Decrease N by S %: N (1 – S/100). 

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