I am trying to use numbers rounded to 1 decimal place in formulas with a constant. The formated cell rounds to 1 decimal place but the cell with the formula uses the entire number in the formated cell

Ex. 42.7 is the cell formatted to round to 1 place
42.664237 is the actual number

The constant equation is ((A1-38.3)/38.3)+1 . This cell is formatted to round to 4 places

Answer 1 is :1.1149
Answer 2 is :1.1139

Is there a way to just use the rounded number?