一台录音机原来每台售价250元，现在售价200 元，降价了百分之几？/g0f9J3M6L'b;t*U;k(G'A5f
算式：提示4J9f)@*B0b0o4h/g0f9J3M6L'b;t*U;k(G'A5f
答：降价了百分之,M+t/P0M7_2Z6V1d-v*M:?:{4b.e-d-p-l*]1U9m(u。/g0f9J3M6L'b;t*U;k(G'A5f