It is so very easy and quick if you can simply be bothered to use your calculator.
1.4
(50 / 70) divided by 25 = 2 / 70
0.7286
310.7143
0.1902
The 70 percent of 50 is 35 because to calculate a percetage you multiply the number that you want to calculate the percentage from by the percentage number divided by 100 for this example it will be 50*(70/100) = 35
70
50% of 70 = 50% * 70 = 0.5 * 70 = 35
50% of 70= 50% * 70= 0.5 * 70= 35
If you mean ratio of 5 and 7 then it is 50 and 70
70% of 50= 70% * 50= 0.70 * 50= 35
70 + 70 + 50 + 50 = 240
0.1167