I'm really tired so I'm not 100% sure it's exactly linear, but if the bandwidth is around half then you get twice as much usage. So instead of 5 hours it would

I'm really tired so I'm not 100% sure it's exactly linear, but if the bandwidth is around half then you get twice as much usage. So instead of 5 hours it would be 10 hours, which I'm guessing is around 1.4% of the month.