A cloth

There are flower cloth 495 meters, white cloth 330 meters.
What is the percentage of white cloth?
How much is white cloth less than flower cloth?

Correct answer:

p =  40 %
x =  165 m

Step-by-step explanation:

$$\begin{gathered} f=495\text{ m } \\ w=330\text{ m } \\ p=100\cdot {\displaystyle \frac{w}{f+w}}=100\cdot {\displaystyle \frac{330}{495+330}}=40\mathrm{\%} \end{gathered}$$

$x=f-w=495-330=165\text{ m}$

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