72% can also be written as 0.72, so take 0.72 x 45 = 32.4
Subtract 32.4 from 45 45 - 32.4 = 12.6 You need 12.6 renewals in 5 days.
2 2/5 x 3/7(less) =1 1/35
I only thought of an equation for the less one.
1mm = .11m
You can get this by simplifying the numbers you already have
Answer:
There could be many answers, please be more clearer.