There's actually another problem with their math even on its face. $3.7 billion equates to more than 3.7 billion tracks, since some stores like Amazon sell tracks for less than 99 cents and the music industry cut is less than 100%. 3.7 billion of 43.7 billion is eight percent, so the percentage of legal downloads is probably 10% or more. Then the illegal percentage is 90% or less.

If they could make such a stupid error in their final result, where else must they have used bad math for the report?

It wouldn't be so bad if some corporations though were driven into the sun instead.