m×( 1+ 10%)= 1. 1M

The price after further reducing 10% is

1. 1m×( 1- 10%)

= 1. 1M×0.9

= 0.99 m

After reducing the price by 10%, the price is

M×( 1- 10%)=0.9M

The price after further increasing 10% is

0.9M×( 1+ 10%)=0.99M

0.99M=0.99M，0.99M