How would you write this mathematical equation?

Question

write a math equation to represent the situation describe below:

"27% of a number is 12.15"

use the equation to find the number.

Answer 1

0.27n = 12.15

And then divide each side by 0.27

Answer 2

it would be .27n = 12.15

for percents you always move the decimal point over two places to the left. 27% = .27

any time a problem says the word "of" you multiply what they give you.

and every time a problem says the word "is" you put an equal sign.

Answer 3

27% of a number is 12.15

change the percentage to a decimal

27% = 0.27

of = X    "the word of always signifies multiplication"

a number = n

is = "="   "is will always be equals"

12.15 = 12.15

so .27n = 12.15

divide both sides by .27 and you get

n = 45