Question 1201373
<pre>
              Lastmonth          Thismonth

Gan            0.9k              0.9k-220

Koon            k                 k+200
</pre>

"In the end"  must mean, "This Month".


{{{0.9k-220=(7/10)(k+200)}}}----------literally according to the description.  

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Use found k to evaluate 0.9k.