1 time (1+20%)= 120% (the current price is 120% of the original price) (take this price as "a").
120% times (1-20%)=96% (this price is 96% of the price of "A" and 96% of the original price).
1 time (1-96%)=4%
A: At this time, the price is 4% lower than the original price.