Complex sentence: As a result, for around 70 days a year listeners have to rely on FM broadcasts or increasingly DAB for mainstream Radio 4 broadcasts-the number relying solely on long wave is now a small minority.
Split into simpler sentences: As a result, for around 70 days a year, listeners have to rely on FM broadcasts or increasingly DAB for mainstream Radio 4 broadcasts. However the number of those relying solely on long wave is now a small minority.