Final answer:
To estimate 390% of 50, convert 390% to a decimal, multiply it by 50, and the answer is 195.
Step-by-step explanation:
To find 390% of 50, you can first convert 390% to a decimal by dividing it by 100. = 390/100 = 3.90. Then, you can multiply this decimal by 50 to get the estimate. So, 3.90 × 50 = 195. Therefore, a good estimate for 390% of 50 is 195.
Learn more about estimating percentages