Question

Please help i am not smart

Answer 1

Explanation:

Number of shells she had in the begining = 40

Number of shells collected in the morning and at noon = 6 + 3 = 9

Now the number of shell at the end = 40 + 9 = 49

Icreased shells = 49 - 40 = 90

`\text{Percentage increase = $(49- 40)/(40)*100$}`

`=(9)/(40)*100\\\\\\= 22.5 \ \%`