Final answer:
To solve for 12 in decimal and percent, divide 12 by 5 to get 2.4. Then, move the decimal point two places to the right and add a percent symbol to get 240%.
Step-by-step explanation:
To solve for 12, we have to do some algebraic rearrangement. First, divide 12 by 5 to get 2.4. Then, to convert the decimal to a percent, move the decimal point two places to the right and add a percent symbol. So, 2.4 is equal to 240%.