Final answer:
To find the decimal difference between 2% and 0.2%, you subtract the smaller decimal (0.002) from the larger decimal (0.02), resulting in 0.018 or 1.8%.
Step-by-step explanation:
The question is asking to find the difference between 2% and 0.2% in decimal form. First, convert the percentages to decimals by dividing by 100. This converts 2% to 0.02 and 0.2% to 0.002. To find the difference, subtract the smaller decimal from the larger one:
0.02 - 0.002 = 0.018
0.018 in decimal form is equivalent to 1.8% when converted back to a percentage by multiplying by 100. Therefore, 0.2% is equal to 2% minus 1.8%, which corresponds to option a.