library/src/main/java/com/mikepenz/crossfadedrawerlayout/view/CrossfadeDrawerLayout.java
private float calculatePercentage(int width) {
        int absolute = mMaxWidth - mMinWidth;
        int current = width - mMinWidth;
        float percentage = 100.0f * current / absolute;
        //we can assume that we are crossfaded if the percentage is > 90
        mIsCrossfaded = percentage > 90;
        return percentage;
    }
private float calculatePercentage(int width) {
        int absolute = mMaxWidth - mMinWidth;
        int current = width - mMinWidth;
        float percentage = 100.0f * current / absolute;
        //we can assume that we are crossfaded if the percentage is > 90
        mIsCrossfaded = percentage > 90;
        return percentage;
    }
calculate the percentage to how many percent the slide is already visible

@param width
@return