After the outbreak of a mysterious disease the average wait time at a hospital increased by 70% before the outbreak the average wait time at the hospital was m minutes

1.7m

Step-by-step explanation:

Given that 'm' was the waiting time before the outbreak

After the outbreak, waiting time increased by 70%.

This implies that:

70% of m increase

m + 70% of m

m + 70/100 of m

m + (70:100) * m

m + 0.7m

= 1.7m