Percent means parts out of 100 4%=4/100=0.4/10=0.04/1=0.04 4% of sale=0.04 times sales so we have at least means <u>></u> so earnings<u>></u>2200 earnings=1900+comission on sales commision on sales=0.04 times sales 2200<u><</u>1900+0.04timessales solve for sales
2200<u><</u>1900+0.04 times sales subtract 1900 from both sides 300<u><</u>0.04 times sales divide both sides by 0.04 7500<u><</u>sales
First you get figure out that Tara must have 1/3 of the shells from the other two ratios. Then you learn that 76 is 1/3 of the shells, therefore there must be 76*3 or 228 shells total.
