The phrase "approximately double the number" is correct and usable in written English.
It can be used when discussing quantities or measurements that are roughly twice the value of a given number.
Example: "If we increase the budget, we should aim for approximately double the number we had last year."
Alternatives: "roughly twice the amount" or "about two times the figure".
In Bosa, the number of children eligible for primary school is approximately double the number of spaces, resulting in a simple compromise: children either go to school in the morning or the afternoon.
She said the new homes would have solar cells on the roofs which would give residents free electricity and the council would approximately double the number of properties on the site.
The designs so formed are shown to have a maximum absolute correlation between factors of 14 and to be efficient in terms of E s2), particularly when the number of factors m is approximately double the number of runs n or greater.
This figure is approximately double the number killed on the battlefields of Europe during World War I (4 ).
Approximately 3 times as many upstream (24) compared to downstream (7) variants were identified, while 3′-UTR variants were approximately double the number in the 5′-UTR.
When using DHB, the optimized method developed for the automatic matrix sprayer system resulted in approximately double the number of metabolites detected when compared to sublimation and airbrush.
Although this approximately doubled the number of misassemblies and halved the clone contig N50 size, at least 98.9% of the sequence was still covered by clones with perfect neighbors.
Overall we have approximately doubled the number of missense mutations in fz identified by chemical mutagenesis (compare Tables 1– 3).
The transition from single-celled green algae to multicellular land plants approximately doubled the number of genes, with the acquisition of 3,006 new genes.
The present study identified 13,726 genes expressed in mouse skeletal muscle, which approximately doubles the number reported earlier in a microarray based study [ 36].
The annotation of nearly complete genomes for five Saccharomyces species approximately doubled the number of orthologous gene sets available when compared with the sequences available in 2003 (previously 2742 orthogroups).
