The original price of a sweater is 200 yuan. After 20% price reduction, 10% discount will be given on this basis. What's the actual price?

The original price of a sweater is 200 yuan. After 20% price reduction, 10% discount will be given on this basis. What's the actual price?

200 * (1-20%) * 0.9 = 200 * 0.8 * 0.9 = 144 yuan

The original price of a sweater is 200 yuan. After the price is reduced by 10%, the price is increased by 10%. Excuse me: is the current price still 200 yuan? If not, how much is the first increase?
I look at it

200X90=180
180X110%=198

The price of a sweater is reduced by 20% first and then by 20%. What's the current price?

If the original price can be regarded as 1, then after the first price reduction, it is 1-20 ℅ = 0.8
After the second price reduction, it is 0.8 × (1-20 ℅) = 0.64
The current price is 0.64 △ 1 = 64 ℅ of the original price