Press play above, then read the full written lesson in the next item.

Elena — contributed$36,000
Kevin — contributed$108,000

Kevin put in three times what Elena did.

$69,000More than Kevin — what Elena ended up with, having invested $72,000 less. The only variable that differed was time.
Starting balance$8,000Both, at 24% APR
Interest Terrence paid$16,000+Twice the original debt
What he paid in total3×The amount he borrowed
What Terrence borrowed$8,000
What Terrence repaid$24,000+

The same exponential curve that built Elena's wealth, pointed the other way.