百分比变化 meaning in English

fractional variation
percentage variation

Calculate the percent change in heart rate while at rest and after exercise . what does this tell you about heart rate and exercise
计算平静时和运动后心率的百分比变化。您据此可就心率与运动得出甚麽结论？
The power of the percent change chart is its ability to display the relative change in prices of a number of stocks through a given time period
百分比变化图表的强项就是能够在一段给定的时间范围内对一批股票在价格上的相对强弱变化进行描述。