Final answer:
To find the percentage of the total cost of the bike that Wu has saved, divide the amount Wu saved by the total cost of the bike and multiply by 100. Wu has saved 30% of the total cost of the bike.
Step-by-step explanation:
To find the percentage of the total cost of the bike that Wu has saved, divide the amount Wu saved by the total cost of the bike and multiply by 100.
The amount Wu saved is $75 and the total cost of the bike is $250. So, we have: (75/250) * 100 = 30%
Therefore, Wu has saved 30% of the total cost of the bike.