You need to know these two formulas:

For example,

The answer is not applicable. theres not enough information. -fvmousskaylaa
Answer:
12 people can fit so the van had enough sests
You get your hair done for $56.00 and you tip the hairdresser $20.00(D)
You have to subtract 56 from 20% than round the answer to the neared tenth.