30 is increased to 42.What is the percentage increase?(Show your steps)这是什么意思?
问题描述:
30 is increased to 42.What is the percentage increase?(Show your steps)这是什么意思?
答
30增长到42,问增长的百分数是多少?(写出你的步骤)
(42-30)÷30=40%
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