Question

During a 55​-year ​period, 45​% of snowstorms in a certain city caused power outages. Thirty-three of the snowstorms did not cause power outages. Find the total number of snowstorms in this city over the 55​-year period.​

P.S. First, find the percent of snowstorms that did not cause power outages. Write this percent as a​ part-to-whole ratio. Find an equivalent ratio with the appropriate number as the numerator.

Answer 1

percentage of snowstorms did not cause power outage = 100-45=55%
55% = 33
1% = 33/55 = 0.6
100% = 0.6 x 100 = 60

The total number of snowstorms in this city over the 55-year period is 60.