$A$ fruit seller had some apples. He sells $40 \%$ of the apples and still has $420$ apples. Originally,how many apples did he have?

$860 \%$ of $50 + 50 \%$ of $860 = ?$

Two numbers are respectively $20 \%$ and $30 \%$ less than a third number. What is the second number as a percentage of the first?

Harjeet spends $50 \%$ of his monthly income on household items,$20 \%$ of his monthly income on buying clothes,$5 \%$ of his monthly income on medicines and the remaining amount of $Rs. 11250$ he saves. What is Harjeet's monthly income?

If $8 \%$ of the people eligible to vote are between $18$ and $21$ years of age,and in an election,$85 \%$ of those eligible to vote who were between $18$ and $21$ years of age actually voted,then the number of persons between $18$ and $21$ years of age who actually voted is what percent of the total people eligible to vote?

Ram donated $4 \%$ of his income to a charity and deposited $10 \%$ of the rest in a bank. If now he has $Rs$ $8640$ left with him,then his income is