63/7 * 21 = 45/7 * 21 = 45*3 = 135
21 times.
0.4667 times.
1 with remainder 21.
45
of course I guess
divide 45 by 5 and multiply by 3 45 divided by 5 is 7 times 3 is 21.
21/45= 7/15
LCM of 21 and 45=315 Factors of 21= 3x7 Factors of 45=3x3x5 Lcm= 3x5x7x3=315
It is written as 21:45
45
Factors of 21: 1, 3, 7, 21 Factors of 45: 1, 3, 5, 9, 15, 45