Question

Why are we cutting it please tell. And please tell how to solve decimal word problem and fractions word all of these with example please. And please no unnecessarily answer otherwise I will report and all the questions it's humble request​

Answer 1

Because it asked about the shades part. Out of 10 circle 3 are shaded so we write it as 3/10 as a fraction. You have done everything correct.

Why we cut 100 with 10 is because percentage is 100 and so when we multiple 3/10 with 100 it will give it's percentage.