Soal SMA · Soal cerita · Kesulitan 2/5
A company's profit increased by 20% from 2019 to 2020, and then decreased by 10% from 2020 to 2021. If the profit in 2021 was $540,000, what was the profit in 2019?
- A.$450,000
- B.$480,000
- C.$500,000
- D.$550,000
Kunci jawaban & pembahasan
Jawaban: $500,000
Let profit in 2019 = P. After 20% increase: 1.2P. After 10% decrease: 0.9 × 1.2P = 1.08P = 540,000. So P = 540,000 / 1.08 = 500,000.
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