Charles W. answered 11/15/19
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AP/IB Certified and Experienced Micro/Macro economic teacher
Hello Joshua P.
The MPC and MPS must equal 1.
If your MPC is .8 your MPS will equal .2. - Multiplier = 5
If your MPC is .75 your MPS will equal .25 - Multiplier = 4
Cheers,
C