Solve for the unknown. round decimals to hundredths and percents to the nearest tenth.
850 increased by 40% =
sales at ll boutique decreased 10% this month compared to last month. if sales this month were $175,581, what were the sales (in $) last month?
shareholders in an electronics company were informed that the company's market share increased from 4.5% to 5.4%, a rise of 0.9 percentage points. what percent increase in sales does this represent?

Step-by-step explanation:

1. "Increased by 40%" is generally understood to mean that the amount of increase is 40% of the original value. That is, ...

  850 increased by 40% = 850 + 40%×850 = 850(1 + 0.40)

     = 1.40×850 = 1190

850 increased by 40% is 1190.

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2. As above, "decreased by 10%" is taken to mean the amount of decrease is 10% of the original amount.

  (last month's sales) - 10%×(last month's sales) = $175,581

  (last month's sales)×(1 - 0.10) = $175,581 . . . . collect terms

  (last month's sales) = $175,581/(0.90) = $195,090

Sales last month were $195,090.

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3. The percentage change in market share is ...

  (change in share)/(original share) × 100% = 0.9/4.5 × 100% = 20%

Assuming sales are proportional to market share, the increase in sales is 20%.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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