<P> If V (\ displaystyle V) and Q (\ displaystyle Q) were constant or growing at the same fixed rate as each other, then: </P> <Dl> <Dd> d P P = d M M (\ displaystyle (\ frac (dP) (P)) = (\ frac (dM) (M))) </Dd> </Dl> <Dd> d P P = d M M (\ displaystyle (\ frac (dP) (P)) = (\ frac (dM) (M))) </Dd> <Dl> <Dd> d P / P d t = d M / M d t (\ displaystyle (\ frac (dP / P) (dt)) = (\ frac (dM / M) (dt))) </Dd> </Dl>

In the equation of exchange mv=pq mv is