Сколько процентов жителей мира едят мясо.

Мясо едят все, но не всем его достаётся.

Много НЕ едят мяса.
В Индии, например, более 80% жителей
миллиардной страны - лактовегетарианцы.

Вот и посчитай, на исходные данные по вегетарианцам:

Austria : Inhabitants : 8.1 millions Vegetarians : 3-4 % (estimate) (different Austrian sources)
Belgium : Inhabitants : 10.2 millions Vegetarians : 2 % (Source : survey done for GAIA)
Czech Republic: Inhabitants: 10.2 millions Vegetarians 1-2 % (Source: StemMark Agency, Prague, Czech Republic)
France : Inhabitants: 58.6 millions Vegetarians: less than 2 % (Source: Alliance Vegetarienne)
Germany: Inhabitants: 82 millions Vegetarians: app. 8% (survey) (Source: Vegetarier-Bund Deutschlands e.V.)
India : Inhabitants : 997.5 millions Vegetarians : between 15-20 %
Ireland : Inhabitants : 3.7 millions Vegetarians : around 6 % (estimate) (Source : Vegetarian Society of Ireland)
Italy: Inhabitants: almost 58 millions Vegetarians: 5% (Source: EURISPES – European Institute of political, economical and social studies)
Norway Inhabitants : 4,5 millions Vegetarians : between 2% and 4% (opinion polls) (Source: Dyrevernalliansen, Norway)
Poland Inhabitants: 38.6 millions Vegetarians: under 1%
Portugal: Inhabitants: 10 millions Vegetarians: about 2% ( Source : www.european-vegetarian.org/denmark0.0.html )
Romania Inhabitants: 25 millions Vegetarians: abt 4% (Source : Romanian Vegetarian Society)
Slovakia : Inhabitants : 5.4 millions Vegetarians : abt. 1% (Source : Vegetarianska spolocnost)
Spain Inhabitants: 39.4 millions Vegetarians: around 2% (Source: Asociacion Vegana Espanola (AVE)
Sweden Inhabitants: 8.8 millions Vegetarians: at least 7% (in certain schools a third of the students are vegetarians) (Source: Swedish Vegan Society)
Switzerland Inhabitants: 7.1 millions Vegetarians: 9% according to the Nutritrend-Study, Nestle from 2001 (around 4% would be more realistic) (Source: Swiss Union for Vegetarianism)
The Netherlands Inhabitants: 15.8 millions Vegetarians: 4-5 % (estimate) (Source: Nederlandse Vegetariersbond)
United Kingdom Inhabitants : 59.5 millions Vegetarians: 9 % (high in younger age group) (ICM Poll for the Daily Telegraph, 2001)
USA Inhabitants: 278.3 millions Vegetarians: 4 % (Source : Time/CNN poll 15 July 2002 – Note: A surprising 42% of all «vegetarians», or 4.8 millions adult Americans, considered slaughter of animals to be murder)

хороший вопрос)) )
поищу в инете, но (( думаю 80-90

Сколько их в мире? « Eurasian Vegetarian Society
сколько; в; мире; вегетарианцев. Щелкните на фразу чтобы перейти к ее первому
появлению, ..Второй по популярности ответ на вопрос, почему человек не ест
мясо, ..или родных вегетарианцы (люди, которые не едят мясо, птицу, рыбу) ? ..

vege.ru/vse-o-vegetarianstve/skolko...
тут о вегетарианцах)