Question

assume x > 0.

what percent of 8x is 5x?
i know that the equation is
5x/8x = p/100
and i have to multiply both sides by 100, but i'm not sure how to multiply 100 * 5x / 8x?

what is 65% of 80x?
again, i know that the equation is
a/80x = 65/100
and i have to multiply both sides by 80x, but i'm not sure how to multiply 80x * a / 80x and 80x * 65 / 100

Answer 1

what percent of 8x is 5x?

---> 5x/(8x) * 100% , the x's cancel
= (5/8)(100)%
= 62.5%

65% of 80x
= .65(80)x
= 52x

Don't make things more difficult than they are

Answer 2

lets admit we all are sixth graders who did big ideas book for math 7/8

Answer 3

I had this question too.

I know its late but all you do is...
5x/8x=p/100
multiply cross products: 100(5x)=500x and 8xp
divide by 8x and you get p=52x
Have a good day!!!

Answer 4

Yes

Answer 5

Not making things more difficult than what they are, that's the way my teacher requires me to solve it. But thanks for helping.

Answer 6

This stuff is bull crap why do we have to learn this

Answer 7

That is wrong u said 8xp but then divided by 8x lol. Actually turn 5x/8x=p/100 into 5/8=p/100 by cancelling out the x's and then just solve ez pz cross products 500/8=x and then u have percent

Answer 8

i got nothing but my love for Mr.Cecrest

Answer 9

I might have the same teacher! Ms. Wong?? You have it half correct. Just multiply 5x/8x by 100, and that becomes .05x/.08x. You actually have it, just not completely.

Answer 10

this really helped me learn how to do this thank you