courses › Business Math

Revenue minus expenses, per-hour rates, and quick percentages of business numbers.

Best in your head · no pen, no calculator why?

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skills · practice stats

From rounds of this course only: box, review and trial answers are left out. Once a skill has 40 tries, it compares your first 20 tries with your last 20.

• Profit for the period par 14 s not tried yet

  worked example

  A bike shop brings in $4,400 of revenue this month. Its total expenses for the month are $5,150. What is its profit for the month? (Use a minus sign for a loss.)

  Answer: -$750.00

  1. Profit = revenue − expenses for the same month: $4,400 − $5,150 = −$750.
  2. Expenses are bigger than revenue, so the result is a loss.

• Revenue per hour par 10 s not tried yet

  worked example

  A design studio brings in $2,800 from 14 jobs. What is revenue per job?

  Answer: $200.00

  1. Divide by the thing after "per": $2,800 ÷ 14 jobs = $200 per job.
  2. That is revenue per job, not profit per job.

• Quick percent of a business number par 9 s not tried yet

  worked example

  An invoice for $1,780 is paid late and carries a 10% late fee. How much is the late fee?

  Answer: $178.00

  1. Build it from anchors: 10% of $1,780 is $1,780 ÷ 10 = $178.

• What share of the group? par 14 s not tried yet

  worked example

  A bike shop finishes 20 jobs this month. 5 of those 20 have to be redone, and 5 new jobs are booked. What percentage of the finished jobs had to be redone?

  Answer: 25%

  1. Share = part ÷ whole starting group = 5 ÷ 20 = 0.25, which is 25%.
  2. The 5 newcomers weren't in the starting group.

rest ladder

Win 3 of your last 4 rounds and the course rests. A win is 90% right, within 2× the round's par. Pass the review when it comes back and the next rest is longer.

1. 1 day
2. 3 days
3. 7 days
4. 14 days
5. 30 days
6. 60 days
7. mastered · every 90 days

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