Final answer:
To find the relative change from last year to this year, calculate the difference between the two percentages. Divide this difference by the original percentage and multiply by 100 to express it as a percentage. The relative change is approximately 75.18%.
Step-by-step explanation:
To find the relative change from last year to this year, we need to calculate the difference between the two percentages and express it as a percentage.
Let's start by finding the difference between 21.3% and 5.3%:
21.3% - 5.3% = 16%
Then, we divide this difference by the original percentage (21.3%) and multiply by 100 to express it as a percentage:
(16% / 21.3%) * 100 = 75.18%
Therefore, the relative change from last year to this year is approximately 75.18%.