Решите 21 3/8-0.9:4/5

Question

Решите 21 3/8-0.9:4/5

Answer 1

          21 3/8 - 0,9:4/5=20 1/4=20,25

1)   0,9:4/5=9/10 * 5/4=9/8=1 1/8
2)   21 3/8 - 1 1/8=20 2/8=20 1/4