A study by the National Association of Social Workers estimates that President Reagan's fiscal 1983 budget would cut the number of people receiving social services such as day care and homemaker aid to about three-fifths of the 1981 level, from 7.7 million to 4.4 million.

According to the study:

The Social Services block grant was funded at about $3 billion in fiscal 1981, cut to $2.4 billion in fiscal 1982 and would be cut to $1.974 billion under Reagan's budget. It helps the states finance day care for the children of low-income working parents, homemaker aid to elderly people, juvenile delinquency and child-abuse services and the like.

About 7.7 million people received services in 1981. The NASW calculated that in 1982 the figure would be 5.7 million and in 1983, 4.4 million, a drop of 44 percent from 1981.

Adoption, foster-care placement and other child-welfare services totaled $523 million in 1981, $465 million in 1982 and would be $380 million in 1983 under Reagan's budget. Children served, 354,000 in 1981, would drop to 305,000 in 1982 and 235,000 in 1983.

Community health centers, funded at $327 million in 1981, provided medical services to 14.8 million people; this dropped to 10.9 million people and $248 million in 1982, and would drop again to 10.5 million in fiscal 1983.

In 1981, $524 million for the Community Services Administration helped support 1,451 community action and related agencies. Funds were cut to $342 million in fiscal 1982, for aid to 920 agencies. A cut to $100 million in fiscal 1983 would provide aid to only 220 agencies.