1C in 1.8 times as large a change.
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1C = 28
1c
1c
The original cost is c, so we have: c + 35%(c) = 670 Change the percent to a decimal. ANd plain c is 1c, so we have: 1c + .35c = 670 --> 1.35c = 670 Divide both sides by 1.35
Have a look at this site http://regentsprep.org/Regents/mathb/1c/preprooftriangles.htm