1: Let warehouse A be X, warehouse B be Y, and the column is: 2/7x+y=x-2/7x, where "/"stands for fraction, with numerator on the left and denominator on the right, in case you don't understand! The solution is 3/7x=y, so 3x=7y, so the ratio of Party A to Party B is 3 to 7.

2. To make the numerator denominator ratio 3: 1, it is 1: 13 at first, and both sides are+1 at the same time, so it is 2: 14, that is, 1: 7, and then it is pushed to the fifth 6:.

3. Take 1 as an example. After the decimal point is moved three places to the left, it becomes 0.00 1, and the ratio with the original is 1000: 1.