Final answer:
To find 20% of the same sum of money, divide the given amount by 12 to find 1%, then multiply that by 20. The answer is $70.
Step-by-step explanation:
To find 20% of the same sum, we need to calculate the value of the sum. We can start by finding the value of 1% of the sum, which is $42 divided by 12, giving us $3.50. Next, we can multiply $3.50 by 20 to find 20% of the sum. This gives us $70. Therefore, 20% of the same sum is $70, which corresponds to option A.
After finding the full amount, we then calculate 20% of it. Here is how you can calculate it:
Calculate the full amount: $42 ÷ 0.12 = $350.
Calculate 20% of the full amount: 0.20 × $350 = $70.
So, 20% of the same sum of money is $70.