Translation of "Percent" in English

Seventy percent time writing twenty percent time rewriting ten percent of

I would then spent 70% time writing, 20% time rewriting,

Ces crocs fins comme des aiguilles percent la peau,

Its needle-like fangs easily pierce the skin,

Faire en sorte que ses crocs percent le gant,

you put the fangs, the fangs go through the glove

Can see here's my control four percent two hundred and twelve leads this one's

So as you can see, here's my control, 4%, 212 leads.