Explanations: Arithmetic Sequence: Every number in the sequence is either added or subtracted by the same number. We know that 12, 4, -4, -12 is arithmetic because each number in the sequence is subtracted by 8.
Geometric Sequence: Every number in the sequence is either multiplied or divided by the same number. We know that 1, 6, 36, 216 is geometric because each number in the sequence is multiplied by 6. We also know that -216, -72, -24, -8 is geometric because each number in the sequence is being divided by 3.
Neither: 1, 2, 8, 64 is neither because it is not being added, subtracted, multiplied, or divided by the same number.
You would set this up as Part÷Whole=Percent÷100 Part=117 Whole= X Percent=78 117÷X=78÷100 Set these up as fractions and cross multiply. You will get 117×100=78X 117×100=11,700 Divide both sides by 78 and you get x=150 There were 150 problems