First published by Money Metals here: https://www.moneymetals.com/news/2020/05/04/silver-is-ridiculously-cheap-relative-to-gold-002024

Silver is historically cheap relative to gold. The gold/silver ratio – the gold price divided by the silver price – reached all-time highs in March. Today the number of ounces of silver it takes to buy one ounce of gold is at 113 – very close to those highs.