Mathematics for IGCSE & O level - Percentages (Section 1 - No. 8)
If a company's revenue decreased by 10% in a year, and was $100,000 last year, what is its revenue this year?
$10,000
$80,000
$90,000
$110,000
Vysvětlení
10% of 100000 = 10000; 100000-10000 = 90000