7 \dfrac{4}{6} - 5 \dfrac{5}{6} =7 6 4 ​ −5 6 5 ​ =7, start fraction, 4, divided by, 6, end fraction, minus, 5, start fraction, 5, divided by, 6, end fraction, equals

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters