Please answer with the most details possible. The answer is suppose to be 57.3% so make sire thats the answer you get. Thank you!

7.6a. Urban aerosols The size distribution of urban aerosols containing photochemical smog are usually bimodal. The "fine particle" mode-less than 2m-contains from one-third to twothirds of the total mass, with the remainder in the "coarse particle" mode. The fine particles are produced by photochemical atmospheric reactions and the coagulation of combustion products. The coarse particles are mainly of mechanical origin. The aerosol over Pasadena, California, was sampled on September 3, 1969 under light to moderate smog conditions. The MMD of the fine particle mode was 0.3m with respectively (Hinds 1982). The parameters for the coarse particles were 8.0m and 2.3 , Estimate what fraction of the total atmospheric aerosol was of photochemical origin