If your economy grows [by] 4 percent, you ought to reduce child mortality 4 percent.
![If your economy grows [by] 4 percent, you ought to reduce child mortality 4 percent.](http://cdn.quoteddaily.com/images/hans-rosling/if-your-economy-grows-by-4-percent-you-ought-to-reduce-child-mortality-4-percent.jpg)
If your economy grows [by] 4 percent, you ought to reduce child mortality 4 percent.