Question

$$$$$$$$$$/$$$$$$$$$$$$
1целая1/4-3/5=

Answer 1

1*1/4 - 3/5 = 1*25/100 - 6/10 = 1,25 - 0,6 = 0,65

Answer 2

1*1/4-5/5=5/4-3/5=(умножаем на множители 5 и 4)25-12/20=13/20=0,65