v0.23.4

Fixed

• Keep exact percentage values and percentage display; adding or subtracting a percentage adjusts the left amount and repeated adjustments compound.
• Support percentage questions, increases, discounts, ratios, fraction and multiplier conversions, and English, Russian, Chinese, and Japanese percentage phrases from the arithmetic vocabulary.
• Preserve percent-of calculations, modulo words, and comma grouping in mixed decimal/grouped percentage quantities; compare equivalent percent and decimal displays in competitor coverage.
• Support proportional percentage questions such as 20% is 500, what is 750 and if 20 is 30%, what is 60%.