Respuesta :
She has 21 out of 21/28 marbles left. So 21 ÷ 28 = .75. To convert a decimal to a percent, multiply by 100. .75*100=75
She has 28 marbles and she gave 21 away... so now she has 7 left... to find 7% out of 26, u divide them. When u divide them u get 25%