is 6/9= 66/100 porportional

No, 6/9 is not equal to 66/100. Simplifying 6/9, we get 2/3.

which is 66.666666666666666...... / 100 :)

Yes, 66.666666666666666...... / 100 is equal to 2/3, which can be written as a decimal 0.666666666666666.... or as a percentage 66.66666666666666%.

To determine if two ratios are proportional, we need to check if their cross-products are equal.

In this case, let's find the cross-products of the given ratios:

Cross product of 6/9 = 6 * 100 = 600
Cross product of 66/100 = 66 * 9 = 594

Since the cross-products are not equal (600 ≠ 594), it means that 6/9 is not proportional to 66/100.