conversations.from: human
conversations.value: At Esme's school, there are 30 teachers and 45 staff members. On a Monday morning, The Best Pizza Inn brought pizza for the staff and teachers as a promotion offer. If 2/3 of the teachers and 4/5 of the staff members ate Pizza, how many non-pizza eaters are at Esme's school?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: The total number of teachers who ate pizza is 2/3*30 = 20
  30-20 = 10 teachers did not eat pizza.
  The number of staff members who ate pizza is 4/5*45 = 36
  The number of staff members who did not eat pizza is 45-36 = 9
  The number of non-pizza eaters is 9+10 = 19