percentage points
puntos porcentuales
the simple difference between two percents, found by subtracting one from the other.
Example
If voter turnout rises from 50% to 60%, it went up 10 percentage points, which is a 20% increase.
In Spanish
puntos porcentuales — la diferencia simple entre dos porcentajes, que se obtiene restando uno del otro.
Si la participación electoral sube del 50% al 60%, aumentó 10 puntos porcentuales, lo que equivale a un aumento del 20%.