Answer: He's done 7/10ths or 70/100 of the hours he has to do, as a percent thats 70%
Step-by-step explanation: You take 35 and divide it by 50 which gives you 0.70 or 0.7, both are the same. You move the decimal point two places to the right and that gives you 70%, to change that into a fraction, just divide it by 100.