SOURCE

var arr =  [113, 25]
let max = [115, 26]
let min = [113, 24]

// 中心
let cn = [(115 + 113) / 2, (24+26)/2]
console.log(cn)

//每份
let q = (115-cn[0]) / 50
console.log(q)
console.log(50 /q)

let aq = (cn[0] - arr[0]) * 50 /q 

console.log(aq)
console.log(aq/ 50)