+82 A survey of $120$ teachers determined the following: $70$ had high blood pressure $40$ had heart trouble $20$ had both high blood pressure and heart trouble What percent of the teachers surveyed had neither high blood pressure nor heart trouble?
+539 70+40=110 students with either condition
110-20 (because there are 20 repeats)=90 teachers with a condition
120-90=30 without conditions
30/120=25%
