Peter earned $40\%$ more money than Albert. Albert earned $20\%$ less than Michael. Peter earned more than Michael by: (in $\%$)

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

When the price of a toy was increased by $20 \%$,the number of toys sold was decreased by $15 \%$. What was its effect on the total sales of the shop?

$125 \%$ of $320 + x \%$ of $125 = 440$. Find the value of $x$.

The percentage of metals in a mine of lead ore is $60 \%$. Now, the percentage of silver is $3/4 \%$ of the metals and the rest is lead. If the mass of ore extracted from this mine is $8000 \, kg$, what is the mass (in $kg$) of lead?

$A$ man spends $75 \%$ of his income. His income is increased by $20 \%$ and he increases his expenditure by $10 \%$. His savings are increased by: (in $\%$)