You can use the ration 6:8 to show she reads 6 pages in 8 minutes. Simplify this ratio first. 6:8 -> 3:4 Now just multiply the 4 by 5 to get 20 pages and the 3 by 5 as well to see how long it takes her to read those 20 pages. 3 • 5 = 15 It will take Frida 15 minutes to read 20 pages.