how to solve error with setting up in local system

[ayushnau]

I ran the command ng serve but it is showing
internal/modules/cjs/loader.js:888
throw err;
^

Error: Cannot find module 'C:\Users\LENOVO\AppData\Roaming\npm\node_modules@angular\cli\bin\ng'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:885:15)
at Function.Module._load (internal/modules/cjs/loader.js:730:27)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
at internal/main/run_main_module.js:17:47 {
code: 'MODULE_NOT_FOUND',
requireStack: []
}
can someone tell me how to solve this