Aprice is decreased from £800 to £640. calculate the percentage change.

Percentage change =20 % decrease

Step-by-step explanation:

Given original price =£800

New price= £640

Now change in price = £800 - £640

= £160

Since the new value is less than the old value so the percentage change will be negative i.e. decrease in percentage

Percentage change =  (Change in Price/ Original Price)× 100

% change= (£160/£800)×100

=

=20 %

Hence percentage change in price = 20% decrease

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation: