The percent decrease is (the amount of decrease)/(original amount) the amount of decrease is $56-2=54$ so the percent decrease is $\frac{54}{56}$ which is about $ 96 \textbackslash\%$ 
The average cost of a long-distance call in the USA in 1985 was 56 cents per minute, and the average cost of a long-distance call in the USA in 2018 was 2 cents per minute. Find the approximate percent decrease in the cost per minute of a long- distance call. (2007 AMC 8, Question \#6) 
Options:
(1) $$90$$ 
(2) $$95$$ 
(3) $$96$$ 
(4) $$97$$ 
(5) $$98$$ 