 <translate> 15% of $300 is (15 / 100) * $300 = $45. Emma will earn an annual ROI of $45 for 2 years for a total of $45 * 2 = $90. 10% of $500 is (10 / 100) * $500 = $50. Briana will earn an annual ROI of $50 for 2 years for a total of $50 * 2 = $100. The difference between their ROI after 2 years is $100 - $90 = $10. Final answer: 10. <yor> 15% ti $300 jẹ (15 / 100) * $300 = $45. Emma yoo gba ROI lododun ti $45 fun ọdun meji fun apapọ $45 * 2 = $90. 10% ti $500 ni (10 / 100) * $500 = $50. Briana yoo gba ROI lododun ti $50 fun ọdun meji fun apapọ $50 * 2 = $100. Ìyàtọ̀ tó wà láàrin ROI wọn lẹ́yìn ọdún méjì ni $100 - $90 = $10. Ìdáhùn tó péye: Mẹ́wàá. 