Final answer:
Jeremiah is 0% shorter now.
Step-by-step explanation:
To find the percent that Jeremiah is shorter, we need to calculate the difference between his two measurements and divide it by his initial height.
Percent shorter = (Initial height - New height) / Initial height * 100%
Since Jeremiah's height did not change, the calculation will be:
Percent shorter = (50 - 50) / 50 * 100% = 0%