Four hundred dollars litecoin market price is really long way from now! Litecoin should have had a platform that support other Cryptocurrency services and market and this would have increase Cryptocurrency activities with litecoin. Litecoin need to start developing towards service not just payment!
Not as much as ETH's $1400 ATH is from its current $200 value, though! Yes, in terms of percentage, Litecoin is kind of like other altcoins at the current value from ATH, but there is still a lot less volume and money needed to push Litecoin back to $400, then it would take ETH to reach even $200 to $400.
Also, Bitcoin in this sense looks "impossible" but then huge volumes and demand continue to grow along with adoption, so BTC back to $20k is not impossible, in the same likelihood as LTC back to $400.