Current price = $5 million, not on market and so is not tested.
True price is said to be actually 20% of it.
So, true price = 0.2 x 5m = $1m
But, if the statement is that true price has been inflated by 80%
Then, the formula is
True price + 80% True price = $5m
True price (1+80%) = $5m...