By what percent will a fraction change if its numerator is decreased by 20% and it denominator is decreased by 60%?

Can you simplify 4/7? 24 points will be awarded!

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?