Change titles to make the difference between quantity and percentage analysis

In this two images title should be different:

https://lab.montera34.com/airbnb.new/images/barcelona/hosts/concentracion-oferta-airbnb-barcelona-201809.png

https://lab.montera34.com/airbnb.new/images/barcelona/hosts/concentracion-oferta-porcentaje-airbnb-barcelona-201809.png