Janelle earned 90% on a test and got 63 points. how many total points were possible on the test?

Ask yourself... 

63 is 90% of what number? 

Convert to math terms: 
is --> = 
of --> * 
what number --> x 

And remember that 90% as a decimal is 0.9 

 

63 = 0.9x 
x = 70

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