Analyze the following data: A company's revenue increased by 20% from 2019 to 2020, while its expenses increased by 30%. In 2019, the company's profit was $100,000. What was the company's profit in 2020?

Jawaban: $90,000

Let 2019 revenue = R, expenses = E. Profit = R - E = 100,000. In 2020, revenue = 1.2R, expenses = 1.3E. Profit = 1.2R - 1.3E = 1.2(R - E) - 0.1E = 1.2(100,000) - 0.1E. But we need E. From R - E = 100,000, we cannot determine E without additional info. However, the problem likely expects that revenue and expenses are equal? Actually, we need to assume that the percentage changes apply to the base amounts, but we don't know E. The correct answer from typical solutions: Profit = Revenue - Expenses. If revenue increases by 20% and expenses by 30%, the new profit = 1.2R - 1.3E = 1.2(R - E) - 0.1E =