The original price of a color TV set is 4200 yuan. The first price increase is 1 / 10, and the second price decrease is 1 / 5. What's the current price?

The original price of a color TV set is 4200 yuan. The first price increase is 1 / 10, and the second price decrease is 1 / 5. What's the current price?

4200 × one tenth is equal to 420 yuan
4200 420 equals 4620
4620 × one fifth is 924 yuan
4620-924 is equal to 3696 yuan