explain 4/5-7/20
Let's evaluate: 45 -720
ⓘTo add fractions, put them over the same denominator, then add the numerators
4×4 -720
ⓘMultiplications are done before additions and subtractions: 4×4 = 16
16 -720
ⓘThe numerator and the denominator are computed before the division: 16 -7 = 9
▶Result:   920
The approximate value of: 920 is:
▷ 0.45