Convert 7.5% into a decimal.

To convert a percentage into a decimal, you divide the percentage by 100. In this case, you take 7.5% and divide it by 100.

So,

( 7.5 \div 100 = 0.075 ).

This process is based on the understanding that percentages represent parts per hundred. Therefore, 7.5% means 7.5 out of 100, which directly translates to 0.075 when expressed as a decimal.

The presence of additional zeros or different placements (like in the other options) can confuse, but they do not change the fundamental conversion process. In a mathematical sense, trailing zeros after the decimal point or numbers with larger or smaller placements (such as 0.75 or 0.0075) do not correctly represent the percentage conversion here.