The best replacement for percentages is proportions.

The best alternatives to percentages are rated as following:
★★★★★  proportions
★★★★★  pixels
★★★  frequencies
★★  percentiles
★★  percentage
★★  points for grades
★  odds
★  points
★  decimals
  grades
  letter grades
  points grading

Your alternative for percentages is not listed? Suggest!
Speaking about percentages, one probably shouldn't forget about grades.

Other search terms related to percentages and their ratings are:
★★★★★ grades
★★★★★ calculator maths
★★★★ pivot tables
★★ standard deviation
You have in mind a companion for percentages and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of percentages in all years. Click on graph for more.
percentages
proportions
pixels