Marginal Rate of Technical Substitution (or Technical Rate of Substitution) is the amount by which the quantity of one input (n)& has to be reduced when one extra unit of another input (n2) is used, so that the total output (q) remains constant:

Dn/Dn2 = MP(n2)/MP(n) = -0.03/2= -0.015 – MRTS for the input n for n2