Answer:
Mo's number has 2 periods, in one period he has a 7 in the hundreds place in the other he has an 8 in the tens place,
Number Hundred Tens Ones
780 7 8 0
Bo's number also has two periods, he has a 1 in the hundreds place and a 2 in the tens place
Number Hundred Tens Ones
120 1 2 0
→Mo's Number (780) is greater than Bo's Number which is (120).