求教个公式 lookup数组

当一个值在上边的区间时，返回下边的值，用=LOOKUP(J19,{0,0.4,0.45,0.5,0.6,0.65,0.81,0.98},{0.5,0.6,0.7,0.8,0.9,1,1.25,1.5}))总是有个不正确的，请各位大侠指教