Final answer:
Aldo received 36 out of 40 votes in the chess club presidential election, which means that 90% of the club members voted for him.
Step-by-step explanation:
The question asks us to determine what percentage of chess club members voted for Aldo as the new president when we know that Aldo received 36 votes out of a total of 40 members in the club. To calculate the percentage, we use the following formula: Percentage = (Number of votes for Aldo / Total number of club members) × 100.
So, we calculate: Percentage = (36 / 40) × 100. When we perform this calculation, we find that the percentage is 90%.
Therefore, 90% of the club members voted for Aldo.