20% của một số bằng 23,4. Vậy số đó là :117
Ta lấy : ( 23,4 : 20 ) x 100 = 117
Vậy số đó là : 117
Số đó là :117 nha
HT
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20% của một số bằng 23,4. Vậy số đó là :117
số đó là : 117
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