How to use float filter to show just two digits after decimal point?

It turns to be quite simple:

My code:

{% set proc_err = nb_err|length / sum * 100 %}
({{proc_err|float}}%)

Can be changed a bit with:

{% set proc_err = nb_err|length / sum * 100 %}
({{'%0.2f' % proc_err|float}}%)

or using format:

({{'%0.2f'| format(proc_err|float)}}%)

Reference can be found here on jinja2 github issue 70