It's well understood that crypto (scams, hacks) has contributed a third to half of the DPRK's foreign exchange income over the last few years.
It's well understood that crypto (scams, hacks) has contributed a third to half of the DPRK's foreign exchange income over the last few years.
So a sixth?
"<fraction> to <fraction>" means some value in between those endpoints.
You're thinking of "<fraction> of <fraction>".
33% to 50%.