Question

if 40% of a given number is 8 then what is 15% of the given number

Answer 1

you could use ratios, or you could solve for 100% of the number, then find 15%

ratios:
\[ \frac{8}{.40}= \frac{x}{.15} \]

Answer 2

\[\frac{ 4 }{ 10 }=\frac{ 8 }{ x }\]

Answer 3

to find that number, (let's represent it by x)
\[\frac{ 40 }{ 100 } \times x = 8\]
\[x=20\]
Now that you know the number,
find 15% of that..
\[\frac{ 15 }{ 100 } \times 20 =??\]

Answer 4

3.0 ?

Answer 5

So then you multiply .15 by 20 and get 3.0?

Answer 6

yes...you are right!

Answer 7

thank you

Answer 8

it is 3...

Answer 9

yw....(: