Proportion (continuous) (left and right) 2.5:1 7:12 9:5 2.1:0.9 7:3 1:0.4 1 / 6: 2 / 7 20:11 and 1 / 9 2.5:1 9:5 7:3 1 / 6: 2 / 7 (left) 7: 12 2.1:0.9 1:0.4 20:11 and 1 / 9 (right)

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• 1. Solution ratio 5:8 = 40: X 0.4:1.5 = x: 2.50.2: x = 4:40% x = 1:4:1:4 = 3:8 10: 1 / 5 = 20.5:0.5
• 2. () / 8 = 12 ratio () = 0.75 = 3 of what number = () (fill in percentage)
• 3. What is five out of twelve plus seven out of eight minus nine out of twenty
• 4. If the values of X and y satisfy 3x-y = 7,2x + 3Y = 1, y = KX + 9, then the value of K is equal to K_______
• 5. List the proportions and find that the ratio of 0.25 to 8 / 1 is equal to the ratio of X to 10 4 / 1 of number a is equal to 5 / 1 of number B. find the ratio of number a to number B Zhang Bin on the computer to scale up the following photos, enlarged the photo is 13.5 cm long, how many cm wide? 4 cm high, 6 cm long. It is a rectangle
• 6. In a ratio, the ratio of the two ratios of the group ratio is equal to 7. Given that the two external terms are 3 and 8 respectively, what is the ratio?
• 7. In a ratio, the ratio of two ratios is equal to 3. This ratio is 12 and 8. This ratio is 8 In a ratio, the ratio of two ratios is equal to 3, and the ratio is 12 and 8. This ratio is a process
• 8. When x equals (), the ratio of one-third to X is exactly the smallest sum
• 9. If x is equal to 4 / 7 of Y, then what is the () relationship between X and y? If y = 3.2X (x, y are not equal to 0), then x and y are () and fill in the positive and negative proportion
• 10. Because x divided by 7 equals y divided by 6 (x and y are not equal to 0), what's the ratio between X and y?
• 11. 7: X = 4.8:9.6 16: x = 2.4:3 3:12:11 = x: 8:3:10:9 = x: 12:15 = 2: X 1:4 x = 2:3 x = 16.5 x = 5.2 X: 3:4 x = 12:8 X: 1:7 X: 2 = 1:4 X: 30 x = 15 1:4 X: 1.25 x = 2.25:0.25 8 x: 3:10 9 = x: 24 6:25 9 = 5:4 X: all the solutions are proportional
• 12. List the proportions according to the following conditions, and the ratio of the solution proportion 45 and X is equal to the ratio of 25 and 8. The two external terms are 24 and 18, and the two internal terms are x and 36
• 13. The ratio of 4.5 to X is equal to the ratio of 9 to 0.4
• 14. The ratio of X to 3 / 4 is equal to the ratio of 8 to 1.2
• 15. List the proportions according to the conditions, and find out that the ratio of 8 / 9 to X is equal to 6 and the ratio of 3 / 4 to 9 List the proportion according to the condition and solve the proportion The ratio of eight ninths to X is equal to the ratio of six to three fourths By 9:00
• 16. The solution ratio is 2.25 of x = 3.75 of 2, 11 of 12:5 of 4 = 35 of 36:x
• 17. Solution ratio (X: 12 = 0.5:1 / 3)
• 18. 6.5: x = 0.5:4 X: 0.42 = 7:21 1 / 8:1 / 6 = 1 / 10: x 6 / 2.5 = x / 3 3 / 2:1 / 3 = x: 8 x: 9 / 2 = 1 / 3:2 (solution ratio) 6.5: x = 0.5:4 X: 0.42 = 7:21 1 / 8:1 / 6 = 1 / 10: x 6 / 2.5 = x / 3 3 / 2:1 / 3 = x: 8 x: 9 / 2 = 1 / 3:2 (solution ratio)
• 19. 4 / x = 5 / 80 7.2:12 + 9 / 1: x 2.5 + 6 / 15.6:2.88 + 2.6: X solution ratio
• 20. (1.25 + x): 0.25 = x: 1.6 solution ratio