Question

a dog shelter had 20 puppies last month. This month, 31 puppies are at the shelter. What is the percent of change?

Answer 1

Simple, finding markup, you'll use two equations

Markup=New-Original

Markup%=Markup/Original*100

Markup=31-20
Markup=11

Then,

Markup%= 11/20*100
M%=0.55*100
M%=55%

Thus, the percent of change was, 55%.