mdSlider if set step="0.1", when slide the slider it's value will be a long float number

[luozhihua]

<md-slider flex min="0" max="20" step="0.1" md-discrete
                  ng-model="component.animation.duration"
                  aria-label="transition-duretion" id="duration-slider">
</md-slider>

<md-input-container flex>
    <input type="number" min="0" max="20" step="0.1" ng-model="component.animation.duration" aria-label="transition-duretion" aria-controls="duration-slider">
</md-input-container>

When I slide the slider, it's value will be a long float number like those:
14.700000000000001,
0.7000000000000001,
1.7000000000000002

[mprentic-harris]

We're seeing this as well with 0.05 step increments. Glad to see that a PR is already in progress. Thank you!