помогите решить пример по математике 4 3/14 +1/2 -2 3/4

4_3/14 + 1/2 - 2_3/4 = 1_27/28

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1) 4_3/14 + 1/2 = 4_3/14 + 7/14 = 4_10/14

2) 4_10/14 -2_3/4 = 4_20/28 - 2_21/28 = 3_48/28 - 2_21/28 = 1_27/28