There are 330 cattle in three villages. If Zhangzhuang increases 17, Lizhuang increases 25 and Wangzhuang increases 42, then the ratio of cattle in Zhangzhuang and Lizhuang is 3:4, and the ratio of cattle in Lizhuang and Wangzhuang is 7:5_ ∩) O... Ha ha

Well, I'll give it to you. After increasing the number of cattle, the ratio of cattle in three villages is 330 + 17 + 25 + 42 = 414. The ratio of cattle in three villages is Zhang: Li: Wang = 21:28:20, Zhangzhuang cattle 414 * 21 / (21 + 28 + 20) = 126 (head) Lizhuang cattle 414 * 28 / (21 + 28 + 20) = 168 (head) Wangzhuang cattle 414 * 20 / (21 + 28 + 20) = 120 (head) then Zhangzhuang cattle 126-17 = 109 (head) Lizhuang cattle 168-25 = 143 (head) Wangzhuang cattle 120-42 = 78 (head)
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