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Zorluk: OrtaFractions, Decimals, and Percentages

A municipal transit system tracks its monthly revenue from three fare categories: Single-Ride passes, Weekly passes, and Monthly subscriptions. Single-Ride passes account for 920\frac{9}{20} of the total monthly revenue, and Weekly passes account for 30%30\% of the total monthly revenue. If the remaining revenue from Monthly subscriptions is $21,000\$21,000, what was the total monthly revenue, in dollars, for the transit system?

  1. A
    $28,000
  2. B
    $35,000
  3. C
    $63,000
  4. $84,000Cevap
  5. E
    $105,000

Cevap

The total monthly revenue for the transit system is $84,000.
Single-Ride passes account for 920=45%\frac{9}{20} = 45\% of revenue, and Weekly passes account for 30%30\%. Together, they account for 45%+30%=75%45\% + 30\% = 75\% of total revenue. The remaining 25%25\% (100%75%100\% - 75\%) corresponds to Monthly subscriptions, which equals $21,000\$21,000. Dividing $21,000\$21,000 by 0.250.25 gives the total monthly revenue of $84,000\$84,000.

Adım Adım Çözüm

1
Convert the fraction portion into a percentage.
920=45100=45%\frac{9}{20} = \frac{45}{100} = 45\%
Converting all proportions to percentages allows for direct comparison and addition.
2
Calculate the combined percentage accounted for by Single-Ride and Weekly passes.
45%+30%=75%45\% + 30\% = 75\%
Summing the two given parts determines the total portion of revenue accounted for so far.
3
Find the percentage corresponding to Monthly subscriptions.
100%75%=25%100\% - 75\% = 25\%
The three fare categories make up 100%100\% of the total monthly revenue.
4
Set up an equation to solve for the total revenue TT.
0.25T=21,000    T=21,0000.25=84,0000.25 T = 21,000 \implies T = \frac{21,000}{0.25} = 84,000
Dividing the dollar amount of the remaining category by its percentage equivalent yields the total revenue.

Anahtar Kavram

Combining fractions and percentages to solve for an unknown total value.
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