Best answer:
It's simple. 94*60/80. It reduces to 94*6/8 which further reduces to 94*3/4 which further reduces to 47*3/2. Now do the math. That is the number of minutes it takes. Then subtract 60. The result is one hour and however many minutes are left. I can do it in my head WITHOUT a calculator. ...
show more
Best answer: It's simple. 94*60/80. It reduces to 94*6/8 which further reduces to 94*3/4 which further reduces to 47*3/2. Now do the math. That is the number of minutes it takes. Then subtract 60. The result is one hour and however many minutes are left. I can do it in my head WITHOUT a calculator. It's(135+6)/2=70.5 minutes = 1 hour 10 minutes 30 seconds. All done without a calculator.