3 / 4 - (5 / 7-0.25) | Math enthusiast | Mathematical art

3 / 4 - (5 / 7-0.25)

3 / 4 - (5 / 7-0.25)
=3/4-7/5+0.25
=0.75+0.25-5/7
=1-5/7
=2/7
If you understand and solve your problem,

4:25-3 and 5:6 - (2:1-1:4)

4.25-23/6-（13/6-7/4）
=51/12-46/12-26/12+21/12
=0

A simple algorithm is used to calculate 1.7 △ 0.25,

1.7÷0.25
=(1.7×4）÷（0.25×4）
＝6.8

7 / 8 - (7 / 8-3 / 4) is calculated by the simplest method

7/8-（7/8-3/4）
=7/8-7/8+3/4
=3/4

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