# Percentage math introduction for class 7 Hindi and English

## Percentage Chapter for class 7 pdf Percentage Mathematics: in this post we will explain about mathematics for class 7 . We learn in this post how we convert any fraction to decimal and how we find out percentage of any numbers. Now lets start.

Definition:- A percentage is a fraction it means that 1/100, If we find out any percentage of any numbers means that numbers divided by 100 means denominator is 100.

The meaning of x percentage is any object divide to equal in 100 parts. Now we denoted as below:-
x% = x/100
For Example:- (i) 36% = 36/100 = 9/25
(ii) 0.6% = 6/1000 = 3/500

Transform the fraction a/b as percentage: a/b = (a/b x 100)%

For Example :-(i) 3/4 = 3/4 x 100 = 75%

(ii) 0.8 = 8/10 x 100 = 80%

1. If the value of A is R% more from B then
Hence, Value of B is low from A = {R/(100+R)X100}%

2. If the value of A is R% low from B, then
Hence, the value of B is more from A = (R/ (100-R) x100} %

(i) If any objects rate is increased R%, but expense no increase then,
Consumption reduction in object
Consumption reduction = {R/(100+R X100}%

(ii)If any objects rate is decreased R%, but expense no decrease then,
Consumption increase in object
Consumption reduction = {R/(100-R X100}%

Based on population percentage

Let be population of any city is P and increase yearly on the rate of R%, then
(i) Population after n year = P (1+R/100) n

(ii)Before population n year = P/ (1+R/100) n

Percentage Math problems are always asks in competitive examination. So taking attention we explain some easy and shortcut method solved question.

Convert the following below question decimal fractions:
(i) 20%
Solve:- 20/100 = 1/5 = 0.2

(ii)8%
Solve: – 8/100 = 0.08

(iii) 0.25%
Solve: – 25/10000 = 0.0025

Q. Convert 9/16 to percentage rate?
Solve:- 9/16 x 100 = 900/16 =56.25%

## Percentage Math Problems with solutions

Question: 1, what percent of 48 are 6?
Solve:- Let x% of 48 = 6
Then, 48 x x/100 = 6
=>12x/⅝ = 6
=>X = 6 x 25/12 = 12.5%

Question: 2, what percent of 18 are 36?
Solve:- Let x% of 18 = 36
Then, 18 X x/100 = 36
18 x = 100 X 36
X = 3600 /18 = 200

Question: 3, 4:5 =? % .
Solve:- 4:5 = (4/5 X 100)% = 80%

Question: 4, ? of 52% =182.
Solve:- Let the unknown number is x
x X 52/100 =182
==> 52x = 182 X 100
==> x = 350

निम्न भिन्नों को प्रतिशत में बदलें .
I) 1/5 = 1/5 x 100 = 220%
II) 7/4 = 7/4 x 100 = 175

III) 3/10 = 3/10 x 100 = 30%
IV) 11/20 = 11/20 x 100 = 55%
V) 1/3 = 1//3 x 100 = 100/3%
VI) 5/6 = 5/6 x 100 = 250//3%
VII) 4//7 = 4/7 x 100 = 400/7%
VIII) 3/8 = 3/8 x 100 = 75/2%
IX) 7/35 = 7/35 x 100 = 20%
X) 11/40 = 11/40 x 100= 55/2%

निम्न दशमलव भिन्न को प्रतिशत में बदलें .
i) 2.5 = 25x 100/10 = 250
ii) 32.5 = 325x 100 /x10 = 3250
iii) 0.4 = 4x 100/10 = 40

Q5.40 बच्चों की एक स्कुल में 24 लड़कियां है तो लड़कों का प्रतिशत ज्ञात करें ?
Solve:- स्कुल में छात्रों की कुल संख्यां = 40
=> लड़कियों की संख्या = 24
=> लड़कों की संख्या = 40 – 24 = 16
=> छात्रों की% = 16/40 x100 = 40 %