When enough people care about autism or diabetes or global warming, it helps everyone, even if only a tiny fraction actively participate.
Elementary considerations led me to the conclusion that a medium, composed of layers of different dielectric constants, must behave as a uniaxial crystal if it is assumed that the layer thicknesses are only a fraction of a wave-length.
To take photographs means to recognize - simultaneously and within a fraction of a second - both the fact itself and the rigorous organization of visually perceived forms that give it meaning. It is putting one's head, one's eye and one's heart on the same axis.
A significant fraction of evangelical voters appear more likely to ignore the candidates' specific economic and foreign policy platforms in favor of concerns about gay marriage or abortion.
Conventional turbines only work up to 200 feet, but capturing a small fraction of the global wind energy at higher altitudes could be sufficient to supply the current energy needs of the globe.
A reciprocal of a fraction is found by flipping it upside down. If you want the reciprocal of a mixed number or a whole number, just convert it to an improper fraction, and then flip it!
I have a job I'm pretty good at. I am in charge of things. I am on committees. People respect me and take my counsel. I want to be strong and professional, but I resent how hard I have to work to be taken seriously, to receive a fraction of the consideration I might otherwise receive.
The Tea Party people say they're angry about socialism, but maybe they're really angry about capitalism. If there's a sense of being looked down upon, it's that sense of failure that's built into a system that assures everyone they can make it to the top, but then reserves the top for only a tiny fraction of the strivers.
Most religious people in America fully embrace science. So the argument that religion has some issue with science applies to a small fraction of those who declare that they are religious. They just happen to be a very vocal fraction, so you got the impression that there are more of them than there actually is.
Photographs aren't accounts of scrutiny. The shutter is open for a fraction of a second.