Question

A student was said to divide a number by 9/11 but he multiplied by 9/11
and the result was 80 less than the actual result. What was the number?​

Answer 1

Answer:

Let the number be p

p×(9/11)=(p÷9/11)-80

9p/11=11p/9 -80

(11p/9)-(9p/11)=80

p(11/9 -9/11)=80

p40/(9×11)=80

p=80×9×11/40=2×9×11=198 Ans