Sally's dance school had 60 students last year. This year there are only 48 students enrolled. By what percent did the enrollment decrease? Show all of your work to justify your answer.

20%

Step-by-step explanation:

60-48=12

changed ÷ original x 100%

= 12 ÷ 60 x 100%

= 20%

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents