$25\%$ of a number is less than $18\%$ of $650$ by $19$. The number is :

Two numbers are less than a third number by $30\%$ and $37\%$ respectively. How much percent is the second number less than the first?

Two numbers are more than a third number by $20\%$ and $50\%$ respectively. These two numbers are in the ratio:

A number is first increased by $10\%$ and then reduced by $10\%$. The number thus :

In the expression ${\mathrm{xy}}^2$, the values of both variables $x$ and $y$ are decreased by $20\%$. Thus, the value of the expression is decreased by:

The difference betweeen two numbers is $15\%$ of their sum. The ratio of the larger number to the smaller number is :

A man's working hours per day were increased by $20\%$ and his wages per hour were increased by $15\%$. By how much percent were his daily earnings increased ?

The air consists of $79.2\%$ of nitrogen, $20.7\%$ of oxygen, $0.08\%$ of other light gases and the remaining gas is Argon. The volume of air consisting of $1$ cubic meter of Argon is:

If the income tax is increased by $19\%$, the net income is reduced by $1\%$. The rate of income tax is :