Sorting numeric data in char form

I want to sort data as per row 1 which should give result as below-

'-25~0'

'0~25'

'25~50'

'50~75'

'75~100'

'100~125'

'125~150'

'150~175'

Sortarray instruction is giving following result-

'-25~0'

'0~25'

'100~125'

'125~150'

'150~175'

'25~50'

'50~75'

'75~100'

Does anyone has solution for this?

Note: All the data is in character form.