Question

The population of a city is increased by 30% and thus became 78000. What is the original population?

Answer 1

Answer: 78000 = x + 30/100x

or 78000 = 100x + 30x/100

or 7800000 = 130x

or 60000 = x

Therefore, the original populaton was 60,000

Step-by-step explanation:

Answer 2

Answer:

The original population is 60000

Step-by-step explanation:

The population increased by 30% and became 78000

Let x be the original population

Therefore,

x + 30x% = 78000

x + $\dfrac{30x}{100}$ = 78000

$\dfrac{100x+30x}{100}$ = 78000

130x = 7800000

x = $\dfrac{7800000}{130}$

x = 60000