Answer:
1. X/Y = P x 100
2. log a (x) = log b (x)
log b (a)
3. r = d/t (rate= distance÷time)
4. discount = marked price - selling price 'OR'
discount percentage formula = marked price x discount rate
5. mark up = 100 * profit/cost
6. commission = sales x rate of commission
7. percent of change =
new value - old value x100%
old value
8. sale price = P(original price) - PD(discount percent)
9. I = PRT (PxRxT)
I = interest
P = principal (initial value)
R = intereste rate
T = time(years)
10. sales tax = total sales x sales tax rate
