Theo đề bài ta có :
Lãi : 25%
Vốn : 100 %
Vì : lãi + vốn = giá bán
Nên giá bán = 100 % + 25 % = 125 (%)
Lãi số % theo giá bán là :
25 : 125 x 100 = 20 (%)
Đáp số: 20%
Đáp án:
Coi giá vốn là 100%, giá lãi là 25%.
Vì: giá lãi + giá vốn = giá bán
Nên ta có giá bán là:
100% +25% = 125%
Người đó lãi được số phần trăm theo giá bán là:
25 : 125 × 100 = 20%
Làm hộ em với ạ Bài 4 câu 1 2 3 thôi ạ Làm ơn giúp em
Cân bằng PTHH : 1. A + O2 ---> AxOy 2. A + Cl2 ---> AClx 3. AClx + KOH ---> A(OH)x +KCl 4. Ax(SO4)y + KOH ---> A(OH)x + K2SO4
giúp mik bà 7 nha,lỡ may mà đúng thì mik sẽ tick hết cho các bạn. THANKS.
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