Complex sentence: On September 25,2013, the new Kindle Fire HD (7-inch) price was reduced to $139, increased the processor speed to 1.5 GHz, upgraded the OS, removed the front camera, and lowered the storage.
Split into simpler sentences: On September 25,2013, the price of the new Kindle Fire HD (7-inch) was reduced to $139. This update increased the processor speed to 1.5 GHz, upgraded the OS, removed the front camera, and lowered the storage.