gistfile1.txt

# ruby 2.1.6

irb(main):006:0> 0.30 * 100
=> 30.0
irb(main):007:0> 0.29 * 100
=> 28.999999999999996
irb(main):008:0> 0.28 * 100
=> 28.000000000000004
irb(main):009:0> 0.27 * 100
=> 27.0