9.6 * 89 / 1993 + 1103 * 24 / 25 * 1993

9.6 * 89 / 1993 + 1103 * 24 / 25 * 1993


원판 = 9.6 × 89 × 25 / 1993 × 25 + 1103 × 24 / 1993 × 25 통분
= 24 × 0.4 × 89 × 25 / 1993 × 25 + 1103 × 24 / 1993 × 25
= 24 × 89 × 10 / 1993 × 25 + 1103 × 24 / 1993 × 25
= [24 × (890 + 1103)] / [1993 × 25] 합병
= 24 × 1993 / 1993 × 25
= 24 / 25