Well, darling, if you want to round 140 to the nearest 100, you'd get 100. It's not rocket science, honey. Just chop off the zero and you're left with 100. Easy peasy lemon squeezy.
149 to the nearest hundreds is 100
100
100
100
140/100
55 x 100/140 = 39.29% to the nearest hundredth
148 rounded to the nearest hundred is 100
It's 100
100
100
100
140 is 140 to the nearest tenth.