Which of the following pairs is NOT a set of equivalents?

To determine which pair is not a set of equivalents, it's essential to understand how percentages and decimals correlate.

Percentages express a proportion out of 100, whereas decimals represent that same value in a different format. For instance, 50% is equivalent to 0.5 because 50 divided by 100 equals 0.5. Similarly, 75% is equivalent to 0.75, and 10% is equivalent to 0.1, as 10 divided by 100 gives you 0.1.

The pair involving 115% and 1.15 is indeed a correct equivalence since 115 divided by 100 equals 1.15. Thus, it correctly represents the same value in both percentage and decimal forms.

This understanding allows us to identify that the other pairs also represent valid equivalents. Therefore, none of the pairs provided are non-equivalent. Each one accurately reflects the conversion between percentages and decimals, making the questioning of which is not equivalent misleading. The focus should be on the relationships presented in each pair, confirming that each listed combination appropriately aligns with the mathematical definitions of percentage and decimal equivalences.