Answer:

Step-by-step explanation:


81 = 37.5% of x.
81 = (37.5/100)*x
81 = 0.375x
0.375x = 81
x = 81/0.375
x = 216
The number is 216.
Answer:
3/10
Step-by-step explanation:
mom = 35 when girl is born
girl = 0 when born
after 15 year
mom = 35 + 15 = 50
girl = 0 + 15 = 15
fraction = girl / mom = 15/50 = 3/10