学习中心

生活数学

百分数、比、单位换算、日期和时间。

2 篇文章

• 阅读约 2 分钟

  How to calculate percentages: the three types of problem

  How to solve percentage problems of all three kinds — a percentage of an amount, one number as a percentage of another, and percentage change — with checked examples.

• 阅读约 1 分钟

  Ratios and proportions

  Simplify ratios, share amounts in a ratio, and solve proportions — the maths behind recipes, maps and scale models.