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The requriedsolutionfor eachpercentageis1. 350 is 70% of 500 2. 37.5% of 64 is 243. 40% of 6.50 is 2.60 4. 20 of 140 is 28.What is the percentage?Thepercentageis theratioof thecompositionof matter to the overall composition of matter multiplied by 100.Here,We have to determine a number, whose 70% is 350Let eh number x,According to the question,70% of x = 350x = 350/ 70%x = 350/0.70x = 500Similarly,37.5% of 64 is 2440% of 6.50 is 2.6020 of 140 is 28.Thus, the requriedsolutionfor eachpercentageis shown above.Learn more aboutpercentageshere:brainly.com/question/894456#SPJ2...