the student has left 75 because if you add 5 and 70 it gives you $75 that's how much the student had left.
27 and 36 have a Greatest Common Factor of 9 so...
27/36 = 3/4
Step-by-step explanation:
$800 × 5% = $40
for 1 year, I earn $40
100 ÷ 40 = 2 remainder 2
Therefore I would have to leave the money in for at least 3 years to earn $100
