New tires have an average tread depth of 11/32 of an inch. Most states have laws allowing cars to legally run with tires having at least 1/16 of an inch of tread. What percent decrease in tread depth is the maximum allowed by most state laws?

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anonymous · Answer

There is also a few connected questions... 

Tires are considered safe to use in rainy conditions if they have at least 1/8 of an inch of tread. What is the maximum percent decrease in tread depth that is still safe for rainy conditions? 

Tires are considered safe to use in snowy conditions if they have at least 3/16 of an inch of tread. What is the maximum percent decrease in tread depth that is still safe for snowy conditions?

anonymous · Answer

Any answers are greatly appreciated! :)