[Blue Jays]

"...Indonesia is 87% Muslim..."

---

From percentage calculations made in 2010 about the largest Muslim population on the globe.
Hello...it is approaching 2019 now. You seriously think that percentage magically got lower?

[punchamullah]

Nah, no magic. The figure of 87% is the percentage who claim to be Muslim. The law here requires that you declare yourself to be one of seven approved religions, and millions of people who do not practice any religion or are not one of the approved beliefs say they are Muslim just to get along. 80-82% is a more accurate estimate.

[WashingtonSource]

The share of Christians may be higher and Muslims lower, as there have been a lot of conversions to Christianity.

A survey in 2015 found that 6 million living Christians in Indonesia had converted from Islam. See here: http://www.academia.edu/16338087/Believers_in_Christ_from_a_Muslim_Background_A_Global_Census