18 and 1 / 4 * (1-54 / 59) - 17 and 1 / 4 △ 11 and 4 / 5 Simple calculation

18 and 1 / 4 * (1-54 / 59) - 17 and 1 / 4 △ 11 and 4 / 5 Simple calculation

The original formula = 18 1 / 4x5 / 59-17 1 / 4 △ 59 / 5 = 18 1 / 4x5 / 59-17 1 / 4x5 / 59 = 5 / 59 (18 1 / 4-17 1 / 4) = 5 / 59x1 = 5 / 59