The current price of TV is 4200 yuan, which is 12.5% cheaper than the original price. How much is it cheaper than the original price

The current price of TV is 4200 yuan, which is 12.5% cheaper than the original price. How much is it cheaper than the original price

4200 ÷ (1-1 / 8) × 1 / 8 = 600 yuan