1.

Question

86 is 45% of what number?
• 86 = 0.45n
•
n = 0.45 × 86
• 0.45 = n × 86
• 86 = 45n

Answer 1

n = 86 ÷ 45
• n = 1.9111

Answer 2

wrong again...
0.45n = 86
n = 86/0.45 = 191.1