(M/1):(M/0.

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(M/1):(M/0.
(M/1):(M/0.

(M/1):(M/0.
(M/1):(M/0.9)
=(M/1)/(M/0.9)
=(M/1)*(0.9/M)
=0.9/1
=0.9

(M/1):(M/0.9)=(M/1)/(M/0.9)=0.9