Water was lost from the peas.
73.1% of the mass of the original peas was water.
The process of freeze drying removes excess water and allows for food to be preserved while minimizing weight. So the answer to the 1st question is that water was lost. To calculate the answer to the second question, you simply divide the mass of water lost by the original mass, so
(454 - 122) / 454 = 332 / 454 = 0.7312 = 73.1%
