my patio is 39' ×25'how many tiles of 16''I will need.

My patio is 30 feet ×25 , I want to install a tile of 16inches .I want to know how many tiles I will need .
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???? 30 ft bi 25 ft or 39 ft bi 25ft....me assume 25*30=750 sq foot

16 inch square =256 sq inch or 1.77777 sq foot

num times=750/1.7=441 tiles

but yu need xtra...16 inch mae not fit exactly intu 25ft or 30ft

& add 10% for brakeage
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