Question

without actual division ,write the decimal expansion of 7\80​

Answer 1

7/80 =7/2*2*2*2*5
Multiply 5 power 3 on denominator and numerator
Hence
7*5*5*5/2*2*2*2*5*5*5*5=7*125/10*10*10*10
875/1000=0.0875
The decimal expansion is 0.0875