Question 199530
Simply add the fractions {{{3/5}}}, {{{1/2}}}, and {{{3/4}}} to get your total time. 



If you need help adding then here's how you add them:



{{{3/5+1/2+3/4}}} Start with the given expression.



{{{12/20+1/2+3/4}}} Multiply the first fraction by {{{4/4}}}



{{{12/20+10/20+3/4}}} Multiply the second fraction by {{{2/2}}}



{{{12/20+10/20+15/20}}} Multiply the third fraction by {{{5/5}}}



{{{(12+10+15)/20}}} Combine the fractions.



{{{37/20}}} Add



So she exercised a total of {{{37/20}}} of an hour. Note: this means that she exercised for total of 111 minutes.