Ответ:\(25\%=0.25=\frac14\).\(200\cdot0.25=50\).\(3\cdot0.25=0.75\).\(5.7\cdot0.25=1.425\).\(0.08\cdot0.25=0.02\).Ответ: 1) 50; 2) 0,75; 3) 1,425; 4) 0,02.