procentage question

Question

A fruit weighs 500g and contans 90% water, gets dehydrated and only contains 80% water how much does it weigh now?

Answer 1

a fruit weighs 500g and contains 90% water, therefore, the fruit contains 10% "fruit"

10% of 500 is 50

the fruit contains 450g water and 50g fruit

the fruit gets dehydrated and only contains 80% water, therefore, it contains 20% "fruit"

the amount of fruit does not change, there is still 50g of fruit

50g of fruit represents 20% of the total weight because 80% is water

50 is 20% of what number ?

50=20%*N

50=0.2*N

500=2*N

N=500/2

N=250g

the fruit now weighs 250g