Answers

1. Answers as follows:
   a) 30
   b) 320
   c) 160
   d) 600

   Step by step:

   * is means equal
   * of means multiply
   * what number is represented by “x”
   * rule for changing percent to decimal is to move the decimal point 2 places to the left.

   a) 12 is 40% of what number?
   12=.40 x
   solve for x by dividing both sides by .40
   30=x

   b) 128 is 40% of what number?
   128 = .40 x
   Solve for x by dividing both sides by .40
   320 = x

   c) 240 is 150% of what number?
   240 = 1.50 x
   Solve for x by dividing both sides by 1.50
   160 = x

   d) 588 is 98% of what number?
   588 = .98 x
   Solve for x by dividing both sides by .98
   600 = x

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