require(rCharts)
df <- data.frame(var = 1:10, x=(1:10)/100)
dP <- dPlot( x ~ x, groups = "var", data=df, type = "bubble")
dP$xAxis(
  type = "addMeasureAxis",
  outputFormat = ".2%"
)
dP$yAxis(
  type = "addMeasureAxis", #y axis measure by default but do anyways
  outputFormat = ".2f" #do fixed 2 decimal just as demo
)
dP