A man realizes he lost the detailed receipt from the store and only has the credit card receipt with the after-tax total. If the after-tax total was $750.03, and the tax rate in the area is 8.7%, what was the pre-tax subtotal?

684.78
if u use the calculator on your phone and put in 750.03-8.7 and then hit the percent button, it gives u what 8.7% is. then press equals and it gives you the answer

Google it that might work

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post