The Tezos rate of reward can fluctuate and depends on several variables, including block rewards, endorsement rewards, block time, daily network rewards and total staked.
For every block, one validator is randomly selected to bake and 32 validators are selected to endorse. The Baker receives the block reward and the fees of all transactions successfully included in the block, and the Endorsers receive the endorsement rewards.
See the Tezos explorer for the latest reward numbers.