# Formula support

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# Formula support

 C D E F G H I J K \$     0.0355 32 64000 2000 \$                    640 \$          0.010 \$          2,272 \$            71 71.8%

I need a formula that changes K to 80% while automatically changing C. The current formula for K is:

=(C-H)/C. How do I get C to change automatically by raising or lowering K?