# Math 106 2.3, 2.4

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1. What percent of 300 is 45?
• P * 330= 45 ***divid 300 in to 45
• P= 300/45
• P= .15
• P= 15%
2. 38 is what percent of 304
• 38/304= P ***divid 304 in to 38
• .125 = P
• 125% = P
3. 12 is 15% of what number?
• 12 = 0.15 *N *** divid .15 into 12
• 12/0.15 = N
• 80=N
4. What number is 6% of 12?
• N= 0.06*12
• N= 0.72
• Therefore, 0.72 is 6% of 12
5. 23 1/3% of 900 is what number?
23 1/3% = 70/30 * 1/100= 7/30

• 7/30 *900= N
• 210= N
6. 69% of \$21 is what number?
• .69* \$21 = N
• \$14.49= N
7. rate of change = the change (divided by) original amount
8. A doctor's basic office fee was increased from \$6 to \$7.50. Find the percent increase.
Rate of change = the change of rate (divided by) original amount. In this case the change represents an increase (\$1.50); hence ,

• rate of increase = increase (divided by) original fee
• rate of increase = \$1.50/\$6
• rtae of increase = 0.25 or 25%
9. Eyeglass frams priced at \$18.20 are to be remarked to \$14.56 because the style change.
• original price = \$18.20
• the change = \$3.64
• Determine the rate of decrease...
• 20%: \$3.64/\$18.20 = 0.2
10. Steve saved \$576 from his annual income of \$6,000. What percent of his income did he save?
• 1. Determin what the the problem is asking you to find
• a. The savings (\$576) is what percent of his annual income (\$6,400)
• 2. State the problem
• b. \$576 is what percent of \$6,400