一个乡去年计划造林15公顷,实际造林比原计划多3公顷,实际造林比原计划造林多百分之几?

就是实际造林比原计划多的占原计划的百分之几

可以用3除以15等于0.2等于20%

答：实际造林比原计划造林多20%。

设多了x
(15-3)x=15
x=0.8
答：实际造林比原计划造林多80%。

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