Answer:
33/100
Explanation:
Because since 4/10 + ?= 73/100 that means the denominator get's change so we know that the demonter for the ? number had to have 100 as a denominator.
And since that number has a 100 for their demonter that means we times our demonter(10 until it get's to 100 so how many times do we times 10 to it get's to 100? the answer is 10.
So since we times our denominator we also have to times our numerator by 10 as well what is 4 times 10? Our answer is 40.
So now our fraction 4/10 is now 40/100. what= 73 when you add it to 40?
Our answer for that is 33 how I know is 40+ 33= well lets add the tens what is 40 + 30=70 now add ones 3 so 73 and our denominator is already the same and our fraction now is 73/100. and there's our answer.
4/10(40/100 now because of the calculations) + 33/100=73/100 so we figured out our mysterious fraction| Mysterious fraction=73/100.
Hope this helps have a magnificent day:)