3/4th of 2.8gigs is already downloaded meaning 75% of it is downloaded. since there's four boxes and the downloading file is up to 3 boxes it gives you 3/4. so all you have to do is multiply .75x2.8 and the answer is 2.1
So the bar is 3/4 of 2.8GB. All you have to do is convert 3/4 to a percentage, which is 75%. Then divide 75 by 100 because percent is per 100. The answer is 0.75. Then multiply 0.75 by 2.8.