8.7749 x 8.7749
7 * 11 = 77
The only common factor between them is 1, so just multiply the numbers together: 77 x 20 = 1540
154
7 * 11 = 77
Multiply 77 by .2 and subtract the product from 77 and you have 20% of 77.
231
1 x 77, 7 x 11
10
10x2x30
-77
3 and -5.
-1 and 18