how is 2.3-20=17.7 reasonable

It is not reasonable. When you take a number from a smaller number, the difference is negative.

Negative 17.7 is reasonable.

It is not reasonable because when I added 17.7 and 20 I got 2.3

you do know one of the numbers we subtracted is 2.3

.you do know one of the numbers we subtracted is 2.3

To determine if the equation 2.3 - 20 = 17.7 is reasonable, we can follow these steps:

1. Subtract 20 from 2.3:
2.3 - 20 = -17.7

2. Compare the result to the expected answer of 17.7.

From the above calculations, we can see that the result of -17.7 does not equal 17.7. Therefore, the equation 2.3 - 20 = 17.7 is not reasonable.

If you were expecting the equation to equal 17.7, there might have been an error in either the calculation or the input. Double-checking the arithmetic or the values being used in the equation would be helpful in identifying the mistake.