29.4 is a positive decimal number.
Rounded to the nearest ten so that the units (or ones) are removed it becomes 30.
If the question refers to presenting this number without any figures after the decimal point then it can be written as 294 x 10-1
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0.102
It is a 294.'54'% increase recurring decimal '54'
8 294/1000 = 8.294
420 / 70 = 6Converting decimal to a percentage: 6 * 100 = 600%
Try it out! Do the division on your calculator; if the result is an integer (no digits after the decimal point), it is divisible. Otherwise it isn't.