EDP vs EDT vs EDC 

The fragrance concentration depends on the amount of fragrance oils used in the formula.
The higher the concentration, the stronger the scent will be.
Parfum vs EDP vs EDT vs EDC
Parfum/Perfume (20%-40%): strongest concentration
Eau de Parfum (10%-20%): high concentration
Eau de Toilette (8%-10%): medium concentration
Eau de Cologne (3%-5%): low concentration
Eau Fraiche (1%-3%): very low concentration