8 21/40 in decimal form is 8.525.
8 + 212 + 40 = 860.
8 21/40 = 821/40= 100 divided by 40 times 821 = your decimal
.8
8 21/40 = 8.525
Its .375
0.2
The answer is 0.4
8 over 40 cancels to a fifth. A fifth = 0.2.
8/20 = 0.4 = 40%
5/40 = 1/8 = 0.125
Expressed as a decimal, 8 40/100 is equal to 8.4.