If 25% of a number is 45 and 70% of the same number is 126, find 45% of that number.

Let x be the number.

Given:
0.25x = 45
0.70x = 126

Solving for x:
x = 45 / 0.25
x = 180

Now, calculate 45% of the number:
0.45 * 180 = 81

Therefore, 45% of the number is 81.