How to calculate the simple algorithm of 75 △ 4 The sooner the better give me the answer

How to calculate the simple algorithm of 75 △ 4 The sooner the better give me the answer


75÷(25÷4)
=75÷25×4
=3×4
=12



4 out of 35 is more than 16 out of 21
Is it a ride or not


Original formula = 4 / 35 * 21 / 16 = 1 / 5 * 3 / 4 = 3 / 20 = 3:20



Brief calculation of 21.4-40.5/705
21.4-40.5/705
0.85*99
7.5*0.45-0.45*6.5
Simple calculation that can be simplified
Urgent need


21.4-40.5/705=
0.85*99=0.85*(100-1)=85-0.85=84.15
7.5*0.45-0.45*6.5=0.45*(7.5-6.5)=0.45