Final answer:
The amount of money Kiran earned is given by the equation y = x - (1/5)x, where y represents Kiran's earnings and x represents Priya's earnings.
Step-by-step explanation:
To find the amount of money Kiran earned (y) knowing that Kiran earned 1/5 less than Priya, we can write the equation:
y = x - (1/5)x
This equation represents Kiran's earnings (y) in terms of Priya's earnings (x), taking into account the 1/5 reduction. To find the amount of money Kiran earned, substitute the value of x into the equation.