Indeed, if they'd reduced the weight by 2x the original weight then they would have succeeded in inventing anti-gravity. The 0.425x (or 42.5%) reduction in wei

Indeed, if they'd reduced the weight by 2x the original weight then they would have succeeded in inventing anti-gravity. The 0.425x (or 42.5%) reduction in weight described in the article is not quite that impressive, but is still quite a respectable achievement.