Question

Find percentage of increase or decrease - 1.price of shirt decreasd from ₹280to₹210 2. Marks in a test increased from 20 to 30
(i need it with explanation even the simplified numbers)​

Answer 1

Step-by-step explanation:

(i) The decrease in price is 280-210=70

Percentage of decrease

$=\frac{70}{280}\times 100$

= 25%

(ii) increase of mark is 30-20=10

Percentage of increase

$=\frac{10}{20}\times 100$

ok= 50%

or

1. initial price of shirt=280

new price= 210..

change in price= 280-210= 70..

percentage decrease=

$\frac{70}{280} \times 100 = 25$

so percentage decrease is 25%

2. intial marks.. 20

new marks... 30

change in marks 30-20=10

percentage change..=

$\frac{10}{20} \times 100 = 50$

percentage increase is 50%

Answer 2

Answer:

33.33%

Step-by-step explanation:

(i) The decrease in price is 280-210=70

Percentage of decrease  

=\frac{70}{280}\times 100

= 25%

(ii) increase of mark is 30-20=10

Percentage of increase

=\frac{10}{30}\times 100

= 33.33%