Problems on Percentage Change

In an examination, $52\%$ students failed in Hindi and $42\%$ in English. If $17\%$ failed in both the subjects, what percentage of students passed in both the subjects?

What percent of $7.2kg$ is  $18gm?$

The value of furniture is $₹ 9000$. If depreciation per year is $10\%$ of the value at the beginning of each year, the value of furniture after $3$ years will be:

The ratio of the number of Boys and Girls in a school is $3 : 2$  If $20\%$of the boys and $25\%$ of the girls are scholarship holders, then the percentage of the students, who do not get the scholarship, is:

$75\%$ of a number is euqal to four-fifth of another number. What is the ratio between first number and the second number?

In an exam Ritiz scored $52\%$ marks, Sunil scored $64\%$ marks and Ravi scored  $74\%$ of marks. The maximum marks of the exam are  $750$. What are the average marks scored by all the three boys together $?$

In an examination, it is required to get $296$ marks out of the aggregate marks to pass. A student gets $222$ marks and is declared failed by $10\%$ marks. What are the maximum aggregate marks a student can get?

If  $A$'s income is $20\%$ more than that of $B$, by how much percent is $B$'s income less than that of $A$?

After $10\%$ reduction in the price of a pen, a student buys $4$ more pens for Rs. $160$. Find the new price of the pen.

Due to an in increase of $50\%$ in the price of eggs, $4$egg less are available for Rs. $24$. The present rate of eggs per dozen is:

If $15\%$ of $(A+B)$ $=$ $25\%$ of $(A-B)$, then what per cent of $B$ is equal to $A$?

Three fifth of a number is equal to$70\%$of another number.What is the ratio between the first number and the second number respectively?

If $24$ carat gold is considered to be hundred percent pure gold, then the percentage of pure gold in $21$ carat gold is:

In a school $10\%$ of the boys are same in number as $\frac{1}{4}$ of the girls. What is the ratio of boys to girls in the school ?

$A$'s salary is $20\%$ below $B$'s salary. By how much percent is $B$'s salary above $A$'s salary?

When the price of a cycle was increased by $20\%$ the number of cycle sold decreased by $20\%$. What was the effect on the sale of the shop?

The percentage increase in the area of a rectangle, if each of its sides is increased by $20\%$, is:

In an examination,$42\%$ students failed in mathematics and $52\%$ failed in Science. If $17\%$ failed in both the subjects, find the percentage of those who passed in both the subjects ?

Number of students in a school in June every year increase by $10\%$ from the previous year. If the school head $2400$ students in June $2010$, how many students did it have June $2012$?

Men, women and children are employed to do a work in the proportion of $1 : 2 : 3$ and their wages are in the proportion of $6 : 3 : 2.$ When $50$ men are employed, total wages of all amount to $4500$. What is the weekly wages paid to a man, a woman and a child, in rupees?