Difference between eau de toilette and eau de parfum

"The higher the percentage of fragrance concentrate, the longer it will last on the skin. Cologne (EDC) 2-4%, Eau de Toilette (EDT) 4-8%, Eau de Parfum (EDP) 8-15% & Perfume 15-25%”. *Source - The Perfume Society.

Eau de Parfum meaning

At Le Copy Perfumes all our fragrances are Eau de Parfum and contain the optimum percentage (14% - 20%) of the finest fragrance concentrates