Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
There were 100 people in attendance at the school dance.  Ten percent of the attendees were school faculty and staff.  Of the remaining attendees, two-thirds were girls.  How many boys attended the school dance?

### Response:
 Kati ya watu 100 waliohudhuria, asilimia 10 walikuwa wafanyakazi na wafanyakazi wa shule, au jumla ya 0.1 * 100 = <<100*0.1=10>>10 watu.
Hii inaacha wanafunzi 100 - 10 = <<100-10=90>>90 waliohudhuria.
Kati ya wanafunzi 90 waliohudhuria, theluthi mbili walikuwa wasichana, au (2/3) * 90 = <<(2/3)*90=60>>60 walikuwa wasichana.
Hivyo, kati ya wanafunzi 90 waliohudhuria, wanafunzi waliobaki 90 - 60 = <<90-60=30>>30 walikuwa wavulana waliohudhuria densi ya shule.