Exercises 81-86: For the given amounts A and B, find each of the following. Round values to the nearest hundredth when appropriate. (a) The percent change if A changes to B (b) The percent change if B changes to A 81. A = $500, B = $1000 82. A = S500, B = $200 83. A = $1.27, B = $1.30 84. A = 15, B = 5 85. A = 45, B = 65 86. A = 75, B = 50

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