Original: In 1947, by the Indian Independence Act 1947, the British abandoned their supremacy, and following the Partition of India Amb's Nawab decided to give up the independence the state had previously enjoyed by acceding to the new country of Pakistan.
Simplified: In 1947, by the Indian Independence Act 1947, the British abandoned their supremacy, and following the Independence of India and Pakistan Amb's Nawab decided to give up the independence the state had previously enjoyed by acceding to the new country of Pakistan.