In the given example, P = 10 Q = 4 P1 = 30 es = 1.25
ΔP = 30-10 = 20
Applying these values in the formula, we get,
es =\(\frac{\Delta Q}{\Delta P} \times \frac{P}{Q}\)
es = \(\frac{\Delta Q}{\Delta P} \times \frac{P}{Q}\)
1.25 = \(\frac{\Delta Q}{\Delta 20} \times \frac{10}{4} = \frac{\Delta Q}{8}\)
\(\Delta Q\) = 1.25 \(\times\) 8 = 10