Percent increasing?

Hey guys, sorry if this is the wrong section but I need some help.

Whats a 25% increase of 8?
And how do you get it?

THanks

 

25% increase of 8 is 10... What do you mean "How do you get it?"?

 

Like, How did you figure out its 10? I need a formula o.o

 

you first change the percent value to decimal value
in order to do this, divide percent number by 100
25/100 = .25
now multiply that by 8
8 X .25 = 2

there is increase of 2

 

8/100% = x/25% cross multiply 8x25/100 = 2, x = 2, so 2+8 =10.

 

Moved to Homework Help.

 

Thanks! and thanks to the dude who said to cross multiply idk how to double quote

 

If you want to increase 8 by 25%, simply do 8 x 1.25.

If you want to decrease by 25%, do 8 x 0.75.

It's easy. Just keep in mind that Z x 1 = Z

From that rule, add the % that you want to increase/decrease your number to the 1.