20.4211
780/39 = 20
20.4211
77.6 is about twice the value of 38. So d8 must go into 776 2 times, 20 times, 200 times, etc. Changing that 77.6 number back to 776 must add one decimal place to 2 times, and it becomes 20 times.The actual times is about 20.42, so the estimate was pretty close.
38.8
110.8571
0.0387
0.0052
258.6667
0.049
776.2842
812-36=776 776(divided by)2=388 388+36=424 There are 424 girls in the school....
388x2=776
There were no Olympics in 776.