If the price of a shirt is increased by $25 \%$ and then decreased by $30 \%$,then what will be the net effect?

Sweta invested $Rs. 10,000$ in a scheme exactly three years ago. The value of the investment increased by $10\%$ during the first year,increased by $5\%$ during the second year,and decreased by $10\%$ during the third year. What is the value of the investment today?

$x\%$ of $932 + 30 = 309.6$. Find the value of $x$.

In an examination,a student must get $36 \%$ marks to pass. $A$ student who gets $190$ marks failed by $35$ marks. The total marks in that examination is

$A$ man spends $75 \%$ of his income. His income is increased by $20 \%$ and he increases his expenditure by $10 \%$. By what percentage does his saving increase (in $\%$)?

Two litres of water evaporate from $10$ litres of a solution containing $10 \%$ salt. The percentage of salt in the remaining solution is