A local cable TV/Internet/phone provider charges new customers $99 for all three services, per month, for the first year under their "3 for 99" promotion. Joanne normally pays $54 for her monthly home phone service, $39 for Internet service, and $49 for cable television.
a. What are her percent savings if she switches to the "3 for 99" plan? Round to the nearest percent.
b. If, after the first year, the flat fee for all three services is $129, what are her percent savings?
c. Craig usually pays p dollars for phone service, i dollars for Internet service, and c dollars for cable TV service monthly. Represent his savings under the "3 for 99" plan algebraically, as a percent.