The following individuals can be calculated as simple as possible. 21 / 7 △ 15 / 28 × 15 / 21 (3 / 4-1 / 2-1 / 6) × 12
2 1/7÷15/28×1 5/21
=9/7×28/15×27/21
=104/35
=2 and 34 / 35
(3/4-1/2-1/6)×12
=3/4×12-1/2×12-1/6×12
=9-6-2
=1
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