Class 8 Percentage assignment

 Q1. 72% of 25 students are good in Mathematics. How many are not good in Mathematics?

Ans:- 7 students

Q2. Express 20 paise as a percentage of 4 rupees.

Ans:-4 rupees = 400 Paise

20/400X100% = 5%

Q3. The price of a scooter was $34000 last year. This year its price is $40800. Find the percentage increase or decrease in price.

Ans:- 20%

Q4. IF 9.5% of a number is 76. Find the number.

Ans:- 800

Q5. Increase the number 240 by 15%

Ans:- 276

Q6. In a class, the girls are 60% of the total number of students and the boys are 18 in number. How many students are there in the class?

Ans:- 45 students

Q7. On increasing the price of a cycle by 14%, it becomes $1425. What was its original Price?

LEt original price= x

New price = (1+14/100) X original price

1425 = 114/100 X original price

1425X100/114 = ORiginal price

$1250 = original price

Q8. A number is increased by 20% and then decreased by 20%. Find the net increase or decrease percent.

Ans:- LEt the number be x

Increased number = 20% of x= 20x/100 = x/5

Number = x+x/5 = 6x/5

Decreased by 20% = 20% of 6x/5

= 20/100X 6x/5 = 6x/25

Number = 6x/5 - 6x/25= x/25

Net decrease percents= x/25 X 1/x X100% = 4%

Q9. Swati spends 65% of her salary and the rest she saves. If she saves $2940 per month, what is her monthly salary?

Ans:- $8400