Oswald Optical, Inc. provides a full line of designer cyewear to optical dispensaries. Oswald reported the following information for 2019 and 2020 : Compute return on assets for 2019 and 2020 . Did the return on assets improve in 2020 ? What would cause this ratio to change? Begin by identifying the formula to calculate return on assets. Then complete the formula and compute the return on assets for 2019 and 2020. (Round your answers to one decimal place, X.X%. .)