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ZX-FB413016672026年5月国际A卷 · 第 22 题
2026年5月国际A卷 · 原库模块 2 · Q22 知序中文精讲
A researcher investigated two species of mites: a predator and its prey. At the start of a week, there was an equal number of the two species. At the end of the week, the number of prey had increased by 2100% of the number of prey at the start of the week, and the number of predators had increased by 450% of the number of predators at the start of the week. The number of predators at the end of the week was p% less than the number of prey at the end of the week. What is the value of p?
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