Final answer:
To find the percent of decrease from 5.5 to 2.2, subtract 2.2 from 5.5, divide the result by 5.5, and multiply by 100.
Step-by-step explanation:
To find the percent of decrease, you need to find the difference between the original value and the new value, divide that difference by the original value, and then multiply by 100. In this case, the original value is 5.5 and the new value is 2.2. The difference is 5.5 - 2.2 = 3.3. Dividing 3.3 by 5.5 gives you 0.6. Multiplying this by 100 gives you 60.
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