Final answer:
To find the original price of the toy, divide the increased price by 1 plus the percentage increase. In this case, the original price was £17.36.
Step-by-step explanation:
To find the original price of the toy, we need to undo the 12.5% increase.
Let's represent the original price of the toy as x.
Since the price increased by 12.5%, we can express it as 1 + 0.125 = 1.125.
Therefore, we have the equation: 1.125x = 19.53.
To find x, divide both sides of the equation by 1.125:
x = 19.53 / 1.125 = 17.36.
So, the original price of the toy was £17.36.