Jhon made a 77% on his science test. if he answered 34 questions correctly, how many questions were on the test?

34        77              let x = the amount of questions on the test.
---   =  
x           100

Cross multiply, you will get 77x = 3400
Divide both sides by 77.
You will get 44.155 which rounds to 44 questions. I hope I helped, I tried my best to answer.. I may not be correct but I am moderately sure of my answer

The answer would be 44 questions on the test.