The price of long-distance telephone service fell from 40 cents per minute in 1996 to 22 cents

Question:

The price of long-distance telephone service fell from 40 cents per minute in 1996 to 22 cents per minute in 1999, a 45% (18 cents/40 cents) decrease. The Consumer Price Index increased by 10% over this period. What happened to the real price of telephone service?