21.50 x 25 = 537.50
10.75 x 5 = 53.75
537.50 + 53.75 = 591.25
Answer:
7 x 3/9 = 21/9 = 2.33
11 x 2/3 = 22/3 = 7.33
4/9 x 3/8 = 4/9 x 3 / 8 = 4/3/8 = 1/6
7/9 x 4/5 = 7
/9 ⋅ 4/5 = 28/9/5 = 28/45
1 1/15 x 1/3 = 0.35
= log ( 14/3 * 11/5 ) / (22/15) = log 7 = 0.8451