# Estimation Using Percentages in Situations

## Trending Questions

**Q.**

What percentage of numbers from $1$ to $70$ have $1$ or $9$ in the units digit?

**Q.**Question 8

Out of 15, 000 voters in a constituency , 60% voted. Find the percentage of voters who did not vote. Can you now find how many actually did not vote?

**Q.**Question 2 (a)

Convert the following ratios to percentages:

3:4

**Q.**

How do you write $\frac{1}{8}$ as a percent?

**Q.**

Vivek gets $60$ marks and fails by $20$ marks in an English Paper where the maximum marks are $200$. Find the pass percentage.

**Q.**

If $16\%$ of a number is $72$, find the number.

**Q.**

How do you write $\frac{19}{25}$ as a percent?

**Q.**

Question 2

Income of Gayatri = Rs. 160000 per year. She pays 15 % of this as house rent and 10 % of the remainder on her child's education. The money left with her is

(a) Rs. 136000

(b) Rs. 120000

(c) Rs. 122400

(d) Rs. 14000

**Q.**

In an examination, a student has to secure $45\%$ marks to pass the exam. If Varun got $251$ marks and failed by $19$ marks, what are the maximum marks?

**Q.**

In a class of 35 students 7 students were absent. What is the percentage of students that were present?

80%

20%

30%

70%

**Q.**

A reaction has a half-life of $1$ min. The time required for $99.9\%$ completion of the reaction is _____ min. (Round off to the nearest integer) [ Use $\mathrm{ln}2=0.69$, $\mathrm{ln}10=2.3$]

**Q.**

A towns population of children increased from $376$ to $421$ during the past year.

Find the equation shows how to find the percent increase?

**Q.**

** **A water tank contains $753L750ml$ of water if $189l250ml$of water leak out. Find the remaining amount of water in the tank.

**Q.**

What percent is:

$12$ of $80$

**Q.**

$CP$ of an item is $Rs450$. If it is sold at a loss of $10\%$, then its $SP$ $=$$.............$ $[Rs500/Rs405]$

**Q.**

What is the value of $1\%\mathrm{of}1\%\mathrm{of}25\%\mathrm{of}1000$?

**Q.**

A water tank can hold$200$liters of water. There is a hole in the tank for which water in the water tank flows out at the rate of $5$ liters per hour. How much water will be left after $7$ hours $?$

**Q.**

Find $60\%$ of $1litres$ in $mL$.

**Q.**

Question 9

Meet saves Rs 4000 from her salary. If this is 10% of her salary. What is her salary and also find her net spending? However, Meet wanted to buy a bike, so she started to save 30% of her salary. How much is she saving now?

**Q.**

Find the value of:

$60\%\text{of}50kg$

**Q.**

Find the value of each of the following:

$125\%$ of $4$ hours $40$ minutes.

**Q.**

Find the value of:

$16\%\text{of}175$

**Q.**

What is the complement of $\frac{1}{3}of90\xb0$

**Q.**A student has to secure 35% marks to pass. He got 80 marks and failed by 60 marks. Find the maximum marks.

- 100
- 200
- 300
- 400

**Q.**

There are $160$eggs in a tray. $15\%$ of the eggs broke. How many good eggs are there in the tray?

**Q.**

John bought a sofa set for Rs $4500$ and sold it for Rs $4200$. Find his loss per cent.

**Q.**

$13$ of the $18$ players on the varsity soccer team are seniors. What percent of the players on the team are not seniors?

**Q.**If a car increases its speed from 100 km/hr to 110 km/hr in one second, find the increase in speed in percentage.

- 5%
- 10%
- 15%
- 20%

**Q.**

Relative error =

Actual ValueAbsolute Error

Absolute ErrorActual Value

Percentage ErrorActual Value

Actual ValuePercentage Error

**Q.**

Express each of the following as a percent

$\frac{2}{25}$