63 times
28
Exactly seven times
Their lowest common multiple is 378
20 does not wholly go into 42. However, excluding remainders, it goes into 42 two times.
378 divided by 9 = 42
378 ÷ 7 = 54
63 times
378
28
23.625 times approx
Exactly seven times
42 can go into 828 19 times, but there is a remainder.
Their lowest common multiple is 378
42, 84, 126, 168, 210, 252, 294, 336, 378, 420 . . . infinity.
20 does not wholly go into 42. However, excluding remainders, it goes into 42 two times.
Exactly 42 times.