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 result:

p =  40 %
x =  165 m

Solution:

f=495 m w=330 m  p=100⋅ wf+w=100⋅ 330495+330=40%f=495 \ \text{m} \ \\ w=330 \ \text{m} \ \\ \ \\ p=100 \cdot \ \dfrac{ w }{ f+w }=100 \cdot \ \dfrac{ 330 }{ 495+330 }=40 \%
x=f−w=495−330=165 m

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