A school club sold 300 shirts. 31% were sold to fifth graders, 52% were sold to sixth graders, and the rest were sold to teachers. How many shirts were sold to each group?

Step-by-step explanation:

The total number of shirts that the school club sold is 300.

31% were sold to fifth graders. This means that the number of shirts that were sold to fifth graders is

31/100 × 300 = 0.31 × 300 = 93

52% were sold to sixth graders. This means that the number of shirts that were sold to sixth graders is

52/100 × 300 = 0.52 × 300 = 156

The total number of shirts sold to fifth graders and sixth graders is

93 + 156 = 249

The number of shirts sold to teachers is

300 - 249 = 51

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