Используйте приложение APKPure
Историческую версию Ratio можно получить на Android
Рассчитать или проверить соотношение быстро и легко.
Ratio is a way of showing the relationship between two numbers. "Ratio" is an App, which solves ratios for the missing value X or tells you, if the ratio you input is True or False. It is also intended to be a teaching tool and an excellent tool for students, who are about to learn ratio. Touch and hold the result label to restore.