%/100=7/450000 Cross multiply: % x 450000 = 7 x 100 Divide by 450000 to get the percentage: % =(7 x 100)/450000=0.0015555555555556% A shorter way to calculate x out of y You can easily find 7 is out of 450000, in one step, by simply dividing 7 by 450000, then multiplying...