Verified Answer :

The answer is 870, 87% of 100 is 87units, 87% of 100 is 870units, If it's a nice number like that you can simplify it and make it easier for yourself.

Total number of units to be built in the day\(=1000\: units\).

But due to some circumstances they couldn't meet their threshold, they produced only \(87\)% of \(1000\) units.

We apply our knowledge in finding the percentage of a given quantity to obtain the quantity produced.

The 'of' means multiplication.

The \(87\)% means \(\frac{87}{100}\).

The \(87\)% of \(1000\) means \(\frac{87}{100}\times1000\)

\(=\frac{87}{1}\times10\)

\(=87\times10\)

\(=870\)

Therefore the assembly team was able to build 870 units out of the 1000 units threshold.