text: arithmetic problem...anyone who can help? 1.) three fourths of 900 is decreased to twenty-five percent of 900.what is the percent decrease?  2.)half of the # of cows in a certain farm is 12.5% of the total # of animals in the farm while 33 1/3% of the # of bulls is 1/9 of the total # of animals in the farm.what is the ratio of the # of cows to the # of bulls?  3.)if the radius of a circle is increased by 25%,what will be the percent increase in the area of the circle?   show your solutions... thanks!^^ 1) three fourths of 900 = 675 25% of 900 = 225 % decrease = (675-225)/675 = 66.67%   2) total no. of cows = 25% or 1/4 of total no. of animals on farm total no. of bulls = 3/9 of total no. of animals on farm ratio of no. of cows to no. of bulls = 1/4 : 3/9 = 25:33  3) let radius be x. area of circle = pi multiplied by x squared. if radius is increased by 25%, new radius = 1.25x new area of circle = pi multiplied by 1.25x squared. % increase = (area of new circle divided by area of circle) - 1 =  56.25%