Answer :

1. 2.88
2. 420

Please help me back if you can Thanks!
let the no. be x

now, according to question, 30 % of x = 96

= 30/100 by x = 96
 30x = 9600
thus, x = 320.

Thus, 30% of 320 is 96.

2)  let the no. be y

now, according to question,
15 % of y = 63

= 15/100 x y = 63

 15y = 6300

thus, y = 420.

thus, 63 is 15% of 420