Eliza’s puppy weighed 22 Kilograms at 12 months of age. This is a 120% gain from its weight at 6 months. Eliza used these steps to find the puppy’s weight at six months, but made an error. Step 1. Let x represent the puppy’s weight at six months.
Step 2. x + 120/100 = 22
Step 3. x + 1.2 = 22
Step 4. x = 22 - 1.2

Part A
(1) in which step did Eliza make an error?
Answer

(2) Explain what Eliza did wrong in the step where an error occurred.

Part B
What was the puppy’s actual weight at 6 month? Show your work.
Answer. Kg